Chapter 1 - An Innocent Foot Rub

Everything started out innocently enough. My sister Carrie, who is a year younger than me, sat in the passenger seat as I drove us to the junior college we both attend. We both still live at home, and she rides to campus with me every day, so we spend a lot of time together. We get along pretty well, even being so close in age. Both our parents work long hours as attorneys and often don’t get home until late. As a result, Carrie and I have for all intents raised each other through middle and high school.

Carrie usually deferred to me in most things. If she really wanted something, she could turn into a brat and use her cuteness to get her way. It almost always worked on me and Dad, but no so much on Mom. Lately, she seemed like she was being more assertive.

“Hey, Mark,” she said one morning from the passenger seat. “I want you to take a DNA test with me. We’ve been studying genetics in my biology class and I’m kind of curious to see what comes up.”

I took my eyes off the road to steal a glance over at her. The late spring weather had finally warmed up, and she was wearing her typical outfit. It consisted of shorts that were a bit too short and a white halter top that left little to the imagination. Her sneakers and ankle socks completed the look. I couldn’t help but notice how her outfit accentuated every curve and line of her body. I knew I shouldn’t stare, but Carrie was fucking hot. Her brown hair in a short bob with bangs framed her face in exactly the right way. There was a light smattering of freckles across her nose that added a touch of innocence. She had always hated them, but everyone else thought they were cute.

Her choice of clothing that day was particularly revealing. She wasn’t wearing a bra, and the top of her halter dipped low enough that I could see plenty of cleavage. I could also see the faint outline of her nipple through the thin fabric. The creamy skin of her chest was also dusted with a few more freckles, adding even more to the allure.

I swear I’m not a perv, but I knew her bra size was a 34C. How did I know? I remembered when one of my friends, Jake, had sneaked into her room a few years back during a senior sleepover. He emerged into the living room holding up one of her bras like a fucking trophy, a shit-eating grin on his face. I had tried to get it back, but the rest of my friends all started hooting and hollering like a pack of chimpanzees. All that served to egg Jake on. He held the bra above his head, taunting me, and I could feel my face turning red with embarrassment.

“Come and get it, Mark!” he shouted, and the others joined in, laughing and cheering. I lunged for the bra, but Jake was quicker and darted away, the bra still held high. It felt like an eternity before he finally relented and threw the bra back to me, the room erupting in jeers. I caught the bra and went to return it to her room, my heart pounding. That memory made me smirk as I averted my gaze back to the road. I was trying to focus on driving despite the distraction of her proximity.

Turning back to the road ahead, I gripped the steering wheel a little tighter as I answered, “Sure. That sounds like it could be cool. It’s not too expensive, is it?”

“There’s a site called DNA Detective that’s having a buy one get one free sale right now. Would cost us about forty bucks each.”

“That sounds good,” I said as I nodded at her. “Let me know what I need to do.”

Carrie shot me one of her dazzling smiles and said, “Thanks, Mark.”

I spent the rest of the drive thinking about what her nipples might look like under that top. I imagined them as soft and pink, the areolas a shade darker, her nipples hard and begging for my touch. My mind wandered to how they would feel in my mouth, her moans of pleasure filling my ears as I sucked and teased them. I was so lost in thought that I almost drove too fast around a sharp curve in the road. The bump of the tire dropping off the pavement and sudden jerk of the steering wheel snapped me out of my fantasy. My heart pounded with a mix of desire and fear as I regained control.

I looked over at Carrie, who was looking up from her phone to see what happened. “Pay attention, dumbass,” she said with a laugh.

Later that week, Carrie asked me to send her forty bucks on the cash app. I had forgotten about it but sent it over when she reminded me about the DNA test. Our parents gave us a pretty generous allowance and I wasn’t dating at the time, so it wasn’t a huge hassle.

Another week went by and Carrie showed up with two packages that had tubes and swabs in them. I let her swab my inner cheek twice with long cotton sticks and then she sealed them in the vials to ship them off. I had to sign some a legal looking form and that was that. I soon forgot about it completely.

Carrie continued to tease me, always wearing skimpy outfits whenever we were together. One day it was a short white sundress that was hardly a decent length. Or she wanted me to play tennis and she wore a skirt that ended right at the bottom of her butt. She seemed to enjoy showing the world, and especially me her body as much as possible. She also loved beating me in tennis, since I sucked donkey balls at it compared to her.

I don’t know why Carrie wasn’t dating full time. Every guy she knew was drooling after her, but she kept them all at arm’s distance. I know several of my friends were hot to get with her, but I always discouraged it. I seemed to be the only guy she hung out with. I loved her, but damn I was getting all kinds of boners from the attention she was giving me.

Lately, she had started asking me to rub her feet while we were streaming something on the couch. The other night, as I was coming into the living room to watch Netflix with her, she had fluffed up a pillow on one end of the couch and was laying back against it. As I moved to sit down, she put her feet up in the air and pointed them at me, wiggling her toes. “Give me one of your foot rubs, Mark. I ran three miles this afternoon and they’re feeling a little sore.”

I noticed she was telling me to do it instead of asking like she usually did, but I ignored that. I sat down and let her lower her feet into my lap. I adjusted so her feet were right in the middle of my lap, also turning to face her a bit so I’d have a better angle. I took her foot in a firm grasp, my hands enveloping it completely. The sensation of her smooth skin against my palms was electric, sending a shiver up my spine. I started by massaging the ball of her foot, using my thumbs to apply pressure. I could feel the tension release with each circular motion. Her foot was warm and supple, and I could feel the delicate bones and muscles shifting under my touch.

Moving on to her toes, I took each one between my thumb and index finger, squeezing and rolling them. The way her toes curled and uncurled in response to my touch was fascinating. Her toes were delicate, the nails smooth and well-kept. I took my time, making sure to give each toe the attention it deserved.

“You don’t mind, do you?” she asked after giving a small sigh of pleasure.

“No, it’s fine,” I said with a smirk. “What’s a little stanky sister foot between friends?”

“Mmmmm. Fuck, that feels so good. You’re such a good brother, Mark. I appreciate everything you do for me.”

I’m good at giving foot rubs. I learned how when I was much younger, and I’ve had a lot of practice on both my mom and Carrie. They usually ask me to do it, but it’s gotten to the point where they expect it of me. I haven’t done it as much recently since it had started to seem more awkward. I would be rubbing a foot and I would hear them start to moan. Then my dick would start straining against my pants. I mean, I know my mom and my sister are both attractive, but it feels kind of perverted to get off on rubbing their feet.

Carrie was hard to resist, though. She knew I enjoyed pleasing people, and she took full advantage of it. At least she wasn’t mean about it. A couple of girls I’d dated in high school kind of walked all over me. I had stopped dating this year since I was trying to concentrate on school more. My grades were good and I was hoping to get into the engineering program at the state university next year.

Looking back down at my sister’s foot, I pulled it in a little more. I started working my way down the arch, using both thumbs to press hard into it. Carrie gave out another satisfied moan as my thumbs dug in and circled the tendon. That made my dick twitch, and damn if her other foot wasn’t pressing against it when it happened. I yanked that foot a few inches to the side, hoping she hadn’t noticed.

With a sinking feeling, I watched her open her eyes and look at me. She had a sly smile on her face, which got even wider before she turned her head back to the side and closed her eyes. I could tell she was blushing a little.

“Great,” I thought. “Now my sister definitely knows I’m perving on her.”

I moved further down the foot, gripping her leg above the ankle with my left hand to hold it higher. I used my right thumb to grind in on the heel. “Your feet are feeling a little dry,” I said. “We should get some lotion for next time.”

She smiled but didn’t open her eyes or turn her head. “Already planning for next time, Mark? Are you admitting you like giving me foot rubs?”

I sighed but kept rubbing her heel. “You know I enjoy it. You don’t have to tease me about it.”

She opened her eyes and looked at me then. She went to sit up, holding her hand out for me to help her. I took the hand and helped pull her into a sitting position. She pulled me in tighter and kissed me on the cheek. “I didn’t mean to tease you, Mark. I love your foot rubs, and they mean a lot to me. I’m glad you enjoy them.”

With that, she flopped back down and removed her foot from my hand, putting the other one there instead. “Now, don’t forget the other foot,” she said like the total brat she was. “You need to get in there on the arch on this one. It’s been tight lately.”

I rolled my eyes. “Such a brat,” I said. She only smiled and closed her eyes again.

I began working her other foot over, even better than I had on the first. I had to stop a few times to adjust myself, since my dick was hard and had a mind of its own while I was massaging Carrie’s foot. I felt guilty about it, but I knew we were only teasing each other. It would never go any further.

I pinched her pinky toe kind of hard, and she jumped a little and said “Ow!” while glaring up at me. Then I pinched the next toe even harder while I grinned at her. She yanked her foot back and sat up to swat me on the shoulder. My eyes went wide, and I gave her a crazy look and held my hands out, opening and closing them like I was some kind of crab.

“Oh, you’re going to pay for that, little sister. You will definitely pay for that,” I said in a very creepy voice. “Bwahaha! Time for the crab hands!”

This was one of our old games, which we hadn’t done in years. Her eyes went wide and she jumped off the couch, fleeing deeper into the house with a shriek. I followed, still yelling in the creepy voice. “The crab hands are going to get you, little Carrie! The crab hands are going to pinch you really hard!”