The Mandi Chronicles
Copyright© 2025 by Harry Spivens
Chapter 1: The Beginnings
Incest Sex Story: Chapter 1: The Beginnings - Mikey and his sister Mandi begin to discover their sibling relationship runs deeper than most sibling bonds should run. They decide to pursue this taboo love for each other. The first of several parts forthcoming.
Caution: This Incest Sex Story contains strong sexual content, including Ma/ft Consensual Heterosexual Fiction School Incest Brother Sister Massage Masturbation Foot Fetish Slow
Mandi is my younger sister, and just recently turned 15 years old. She is in her first semester of high school, and is one of the up and coming stars of the varsity girls soccer team. She is very athletic and really fit, thanks to a combination of factors; Mandi was extremely fortunate to inherit not only our mom’s physical beauty, but also her extremely athletic talent on the soccer pitch.
More about mom later on, but needless to say she is definitely the poster girl for Soccer MILF if there is one. I will elaborate about her in further episodes. But, back to Mandi for now. As I was saying, she is very athletic, and has our mom’s beauty. In short, she is the total package.
Mandi is about 5’4” tall, smooth tanned complexion, a nice set of 32B tits that are round and definitely one of her attractive magnets, of which she has several. Her waist is narrow, is one would expect from a 15-year old girl, but her ass! Oh my god! Her ass! Mandi’s bum was so gorgeous. It was full and round, but very petite, well proportioned for her age. She had a set of legs befitting any young soccer girl; well-toned, long, and extremely smooth.
In addition, she also took after our mom in the meticulous department regarding attractiveness and beauty, always sporting just the perfect amount of foundation, blush, and make up powder to accent and highlight her beautiful facial features; her lips were soft, pink, and just a little bit pouty, and becoming fuller as she entered puberty full speed ahead. Mandi always ensured that her lips were glossed shiny and bright, her go to color of gloss being a soft subtle pink that made her own naturally pink lips that much more gorgeous and obvious.
She had dark brown, shoulder length hair, and usually wore it in a pony tail for practice and matches, but during most of the other times, she would let it fall naturally. It was a bit wavy and she would go to the hair salon every six weeks or so and have her stylist put some lighter shade highlights throughout. I will say that this helped her to look a few years older than her newly turned 15 years.
Mandi also had discovered the latest trend of false lashes last year in eighth grade around spring break. She and several of her teammates had gone to a “lash lady” while at a tournament and had gotten their lashes done, complete with mascara and eye liner, the whole nine yards.
I thought mom was going to have a fit when she saw her all dolled up like that, but she just smiled and told her, “You look beautiful Sweetie. It’s time you start to look more like a pretty young lady than a little girl, my love.” And that was the beginning of the entire beauty ritual that Mandi went through every week. And the hair appointment every six weeks.
Mandi and I had always been very close since the time we were little. I am currently 18, and a senior at the high school. I look after my little sister and all the guys on the boys soccer team treat Mandi with the utmost of respect, and take care to look after her as well.
Our closeness as siblings was the main driver of our complete trust for each other, and in each other, especially since last year when Mandi found out that she was going to be on the varsity soccer team this fall. She was also a striker on a top-rated select team, along with several other girls at the school, many of them also in eighth grade last year. They were all very close with each other, having been teammates for a very long time, and the girls shared lots of secrets with each other, and confided in one another as young teenage girls will do.
Our first foray into the taboo of sibling relationships happened this past spring, close to the end of Mandi’s eighth grade year. She was 14-years old at the time. Her birthday is in mid-June. I must be fully transparent at this moment, and state that while the incident about to be recounted was indeed our first exploration into the incestuous beginnings, it was not the first time that I had entertained or acted upon sexual thoughts about my little sister. That had been taking place for nearly all of her eighth grade year, mostly along with images of her either in her soccer shorts, her cheerleader skirt, and her bikini thong.
Yes, mom let Mandi wear a bikini thong swimsuit. In fact, when we went shopping for summer gear just after her 14th birthday for our vacation at the beach resort, mom let Mandi choose her own swimsuit, and she chose a bikini thong. I voiced big brotherly objections, naturally, but deep down inside, I was hoping mom would buy it for her. I wanted to see my sister’s ass cheeks with that turquoise thong splitting them in half, and that silky, shiny turquoise triangle patch covering her pussy. These were some of my first thoughts about Mandi that involved any kind of sexual arousal.
Anyway, mom scolded me and told me, “Mikey, all the girls wear these now. It’s the style, honey. And besides that, it looks cute on your sister. Honey, go put it on and come out and show us.” Mandi went into the changing room, put on the bikini, and stepped out. She struck a way too sexy pose for a 14-year old girl, in my view, but I could also feel my dick getting excited while gazing at my sister’s crotch, and her tits that were being held nicely by the top, but allowing quite a bit of nice cleavage to show off.
She then turned around, and leaned over slightly, putting her hands on her knees, and looking back over her shoulder, smiling at me. God damn!! That ass of hers! I was now really hard and getting so turned on.
“Honey, that looks so cute! Don’t you think your baby sister looks cute in this one, Mikey?” Mom asked me.
How could I not agree? I told her, “Mom, she does really look cute in this one! Mandi, you really fill this out quite nicely. I like it on you.” My cock now throbbing and me doing the best efforts possible to hide my raging boner.
Later that night, I jacked off thinking about Mandi in that bikini, focusing primarily on how hot her ass looked, and that pose she had struck. After about ten minutes of caressing my balls, and stroking my cock, moaning “Oh, Mandi! Oh, Mandi Sweetheart! Ummm, Mandi!”, it was too much. I exploded several ropes of sticky cum all over my sheets, and some of it landed on my chest, ran down my hand, and continued to ooze out of my dick.
It was the best jack off session I had ever had, and I jacked off almost every night, but after that session, things took a turn for the better, and the taboo road began to reveal itself.
This past spring, during her eighth grade year, Mandi and I began the process of bonding very tightly with each other. Not that we weren’t already close, as I’ve mentioned before, but last spring something started to simmer between us, and with both of us trusting each other so closely, we didn’t think much of it, until even later on, which I will get to as this story unfolds.
I had been jerking off to Mandi quite regularly now ever since that fateful bikini swimsuit day back in June. I had dated a couple of girls in the meantime as well, both of them juniors at the high school. Neither of them played sports, but they were both on the dance team, and as such had great athletic ability, which was evident when we would fuck each other. I broke up with the first girl right before Thanksgiving break, and then broke up with the second one just before Valentine’s Day.
Both breakups were similar in reason. They were very jealous of their time with me, and extremely demanding that we spend most all of our free time together. Well, Mandi has a very demanding, hectic soccer schedule between her school team, and her select club, which meant a lot of matches mostly year-round. Mom had been adamant since we were both young that we needed to support each other’s activities and be there whenever possible. And both of us had no issues being there for the other’s matches, or other school or outside activities. We enjoyed it.
Well, both of the dancers I dated didn’t see it that way, and it became obvious that things weren’t going to work out. The sex was fantastic. Both of those girls could fuck all night long, and their pussies were tight. As I had gotten frustrated with both of them about their time demands, I began to use our fucking time as a way to fantasize more vividly about Mandi. So, whenever we fucked, I would develop an image in my mind that depicted Mandi in some sexy pose in her bikini thong, and would fuck my dancer girlfriend, fantasizing that she was Mandi. This made things bearable with both of these bitches, and at least ensured that I was getting some pussy for the time being.
Back to the first taboo boundary that Mandi and I crossed. It was very subtle, and very mild, but at the same time it was the beginning of something that either of us could have stopped after that first encounter, or could chose to pursue further as siblings. The latter ended up being the better choice without question.
I mentioned previously about Mandi’s meticulous attention to her appearance and her beauty regimen. This certainly wasn’t out of the norm for most all 14-year old girls. I vividly remember the 14-year old girls in my classes in junior high all doing similar regimens, and carrying through with them even into high school, getting even more detailed, and more meticulously detailed.
Mandi’s best friend Chloe, another brunette cutie, with very nice 32B tits, and a gorgeous ass, stood about 5’3” tall, and her soccer talent was equivalent to Mandi’s, was the primary instigator of the ensuing event, from the standpoint that it was her inspiring of Mandi to add to her beauty regimen that precipitated what happened. More about Chloe later on as well, as she and Mandi found out they shared lots of similar interests both on and off the field.
Anyway, Mandi came home from soccer practice one afternoon, and was very visibly tired. I asked her if anything was wrong.
“Hey, Mandi. You look really tired, honey. Everything go ok at practice? You feeling alright?”
She looked at me, and said, “Everything’s good, Mikey. I just had a rough practice that’s all. Coach ran us quite a bit today after our shitty play yesterday. My whole body is sore and my legs and feet are really hurting. I’m going to go take a shower to see if that helps. Can you make me a sandwich or something for when I get out? Pleeeaaaasseee?”
I smiled at her, and told her, “Of course, Mandi. Go get your shower and I’ll have a sandwich for you ready. Maybe I can help your legs feel better too. See you when you are out.”
A bit later, Mandi came out of the bathroom that we both shared. Her room was on one side of it, mine on the other. We had to go into our room to access the bathroom and shower. It was a huge bathroom and shower area, with a large tub, and a walk in shower, and a double sink. That way both of us could get ready at the same time in the mornings, just having to wait our turn for the shower.
She wrapped herself in a towel, and went into her room, coming out in a few minutes with a small box, decorated with glitter, sparkles, and lots of girlie stickers on it. She was still wrapped in her towel. She sat the box on the coffee table, and curled up on the sofa to eat her sandwich. For some reason, she had a different quality of beauty about her this time.
Maybe it was the fact that she had just showered, or that her hair was still wet, or that she was wrapped up in a towel. Maybe it was just because I was fucking horny and needed to jerk off, especially after seeing Mandi come in all hot and sweaty. Didn’t matter. She looked gorgeous. More so than before now. Maybe she was just growing into her adolescence perhaps. My dick was hard no matter the reason.
“So, why did Coach run you guys so much today?” I asked. “I mean, shit, you guys won 6-0 against the team you played, and you’re in first place, like what, three games ahead of everyone else,” I asked her.
“Well, yeah, we did kick their ass pretty good. But Coach said that we missed way too many easy shots, and we let their strikers get into the box too many times. He said that if it had been a real team, we might have been lucky to only win by one point, or might even have lost. So, he ran our ass all practice, and made us do full speed drills the entire practice. He said we were loafing and it would hurt us if we didn’t go full speed all game from now on. So, yeah, I’m fucking worn out, Mikey,” Mandi told me.
I was sitting on the other end of the sofa, and I gently rubbed her leg a little, and told her, “Well, Coach is right. And you know it. Loafing will get you beat against good teams, honey. But, you guys will be fine. So, what you say I give you a leg massage to help revive you a little bit?”
I had given Mandi leg massages after practice and after really difficult games several times before, and she looked forward to it. She had first asked me to do that for her several months ago, telling me that Chloe’s brother Charles gave her leg massages and it really made a difference. So I decided it was something we could do together as part of her routine. And I definitely didn’t mind massaging and gently rubbing my sister’s smooth and silky toned legs.
Mandi squealed with delight when I offered, and she immediately leaned back on the sofa arm, extending her legs my direction. She reached into her little box and pulled out a small bottle of coconut oil.
“Here, let’s use this on my legs this time. Chloe uses it when her brother massages her legs and she says it makes your skin really soft and smooth, and it smells nice too,” she said with a smile.
She squirted a good amount on her right leg and I began to massage her calf muscle for her, softly at first, and then with more force. She lifted her leg slightly off the sofa to grant me easier access to her leg, and as she did this, she inadvertently (or maybe not) flashed me ever so slightly, and quickly. I thought I could make out the brief image of her teenage pussy lips underneath the towel. My sister was commando while I was giving her a leg massage. This was the first time she had ever let me do that without her wearing panties, and shorts. It was a brief flash, and I know without a doubt I saw a quick grin move across her face. I pretended not to notice and kept massaging her leg.
After a bit, she squirted more oil on the other leg, and said, “Here, do this one now. The same way. You always do my legs so good, Mikey! They feel great when you’re done!”
I smiled and told her, “Mandi, I love to take care of you so you can be your best! You’re my sister and I want to always look out for you.” I continued to massage her leg and she then did the same thing, giving me yet just a fleeting glimpse of her pussy lips as she lifted her leg. I saw her smile, and this time I smiled back, hoping to acknowledge to her that I liked what I saw. She winked at me. My dick began to dance slightly.
When I had finished both legs, she told me, “Ummm, Mikey. That feels amazing! Want to do something else for me?”
I told her, “Sure, Mandi. What would that be, honey? You had a really rough practice and you deserve a bit of big brother pampering this evening.”
“When’s Mom coming home?” she asked.
“I’m not sure, but she did say it would be later on tonight. She left us a lasagna in the oven for dinner. Said she had to put in some overtime at work to get a project finished before the big shots come in later this week. So it’ll probably be 9-10 o’clock. Why?” I asked her.
“Oh, no reason. I was just curious, that’s all. It’s just that I was hoping we could spend a little bit of sibling time together, that’s all. Mikey, you’re the best big brother a sister could ever have!” she said gleefully.
I smiled and said, “Mandi, you are the greatest sister ever! I adore you, you know that, right? I’ll never let anything happen to you. And when you get to high school this coming fall, you will be protected and taken care of.”
“I know, Mikey! You always take such good care of me, and I know you adore me. You’ve told me that so many times, and it makes me feel so special. I adore you too, Mikey,” Mandi said with a tone of affection and endearment in her voice.
“So, what is it you want me to do for you, honey? This is your chance to be pampered. There are advantages to having a really hard practice,” I said.
She looked at me, and she said, “Mikey, will you give me a foot massage, baby? I mean, only if you want to of course. It sounds kind of weird to ask your brother to massage his sister’s feet, I know. But, Mikey, they are really sore after today. Please, Mikey? Just this once, for me?”
Now, I have always had a thing for pretty feet and gorgeous toes for quite some time. And if I say that I haven’t actually admired my sister’s pretty toes a time or three, I would be struck dead on site and turned into a heap of smoldering ashes. To be asked by Mandi to actually give her a foot massage was a bit of a dream come true actually.
“Honey, I’ll give you a foot massage, dear. And no, it isn’t weird. I mean not anymore than giving your legs a massage to help them feel better, right? And not anymore weird than anything else a loving older brother does for his sister,” I said.
She grinned, and said, “Thanks, Mikey!! Chloe said that all I had to do was ask you. She said that Charles gives her a foot massage lots of times after practice and games, just like the leg massages. She told me that I will be so awesome and that tomorrow I would see the difference. Here, use the coconut oil, Mikey.”
I poured a good amount onto her left foot, coating the top of her foot with it, and then gently began to rub it into her soft skin, using both hands to massage her foot, top and bottom. I rubbed her arch deftly and firmly, with a slight hint of sensuality that I was hoping Mandi would notice as I massaged and caressed her entire foot. She moaned softly, her head now leaning back, and her eyes closed.
“Massage each toe for Mikey. That feels so good the way you’re doing this,” she cooed softly.
I then took each lovely toe and rubbed it between my fingers, and inserting a finger in between each toe, I softly moved in and out between them for her. She had the most lovely natural toes, so dainty and so lovely, her nail beds naturally pink, each toe nail perfectly shaped. My dick was now going nuts inside my shorts.
I repeated this love fest of massage and caressing with the other foot as well. Mandi was cooing softly then entire time.
“Ummmm, Mikey! Oooohhh yeeeeaahhhhh!! Ummm, feels so goooood, Mikey! Ummmmm!”
As I finished this foot, I then decided to make a bold move, hoping it didn’t blow up in my face, but I figured it was ‘win or go home’ at this point, as she had opened the door. So I did something that I had been wanting to do for a very long time to my sister’s toes. I leaned over, and gently kissed each one, then put it into my mouth briefly before moving to the next one.
I was completely petrified at doing her pinky toe and the fourth toe like this, prepared for any kind of outrage, backlash, or anger and indignation that might spew forth from Mandi’s inner being. Holy fuck!! She moaned and cooed!
“Ooooohhhhh, Mikey!! Kiss each one for me, Mikey!! Ummmm, suck them all, just like that! Oooohhhh that feels so nice!! Do them all for me, Mikey! Suck all your baby sister’s toes for her!”
My sister was getting turned on by me massaging her toes, and then sucking and kissing them for her. My 14-year old, eighth grade sister was loving the moment of having her toes worshipped like this. So was I, and my dick was throbbing and pulsing. I could feel a wet spot of precum building in my boxers. My sister and I were in the throes of foot worship love.
After I had done all of Mandi’s toes with my mouth and tongue, she handed me a small rag that was near the sparkly box she had brought down with her. I suspected that this was definitely pre-meditated on her part, and her conversation with Chloe was further proof.
I wiped her foot clean of all the coconut oil, and dried her toes of all my saliva, and as I dried each of them, I gently kissed each toenail one more time very lovingly. When I was done, she looked at me and smiled, and said, “Mikey! That was so good, honey! I loved it! What made you decide to kiss and suck my toes after the foot massage?”
“You aren’t mad about that, I hope,” I said, now a bit tentative that post-taboo clarity had set in.
Mandi giggled and said, “No. Not at all, Mikey! I’m just curious, that’s all, because it was so fucking hot! I’ve never had that done to my toes before. The massage was great, as always, but that part with my toes! Goddamn!! So fantastic, on a lot of different levels!”
Looking at her, I told her, “Mandi, I have always found you so pretty, in fact, more than pretty. I find you gorgeous, even though your my junior high sister, I don’t care. I adore you, as I told you. And I want to make you feel special, and always make you feel good. You have a great soccer career ahead of you, and I am so proud of you, honey. You really enjoyed that? Well, so did I!”