Sister's Plan Unravels - Cover

Sister's Plan Unravels

Copyright© 2025 by MrCurrie

Chapter 4

Incest Sex Story: Chapter 4 - Jealous of her mother’s affection for her brother, Mia hatches a plan to sabotage his studies—determined to knock him off his pedestal. Narrated from Mia's POV.

Caution: This Incest Sex Story contains strong sexual content, including Ma/Fa   Consensual   Heterosexual   Fiction   Incest   Mother   Son   Brother   Sister   Pregnancy  

At some point, Steve had rolled off me during the night, maybe intentionally, fearing he would crush me. I turned onto my side, watching him sleep. His steady breathing and peaceful expression wrapped me in a comfort I had never known—an undeniable feeling of being in love with him.

When I eased off the bed, I must have awakened him, as he mumbled, “Time to get up, already?”

“Yeah,” I replied, with a smile. “From the smell of breakfast, I’d say she’s been downstairs for quite a while. I don’t think she minds letting us sleep in today—it’s Saturday, after all.”

After explaining how I wanted him to proceed with Mom, I quietly left and joined her in the kitchen. Her humming provided a clue as to whether she rested well—that, along with her smile. I wondered if her pussy had received as much attention as mine had the previous night.

After I finished setting the table, Mom brought the dishes over as Steve walked in and instead of flopping into his usual seat, he pulled out Mom’s chair and helped her settle in at the table. Her smile broadened as she added, “Thanks, Steve, and good morning to you and Mia.”

“Good morning, Lydia,” he countered, smiling in my direction, showing how well he followed my instructions.

I wondered if Mom called him Steve because I mentioned he preferred it or was she still role-playing. We split up to do our chores afterward, breaking for a light lunch before finishing up. We decided to shower before dressing up for our dinner date.

I hurriedly finished, dressed, and joined Mom in her bedroom, just as she was selecting her outfit. Stepping in front of her, I quickly found the dress I was looking for. Handing it to her, I didn’t need to say anything as she grabbed it, turned around, and changed.

The floral-printed, sleeveless sundress rested gracefully on her shoulders by thin, delicate straps. The plunging neckline added a touch of boldness to its airy design, exposing a tantalizing view of the creamy-white valley between her breasts. The soft fabric flowed over her curves, ending with a short hemline, showcasing her shapely, smooth thighs.

“Wow, Mom! You’re beautiful,” I expressed, my gaze traveling up and down her body.

Her cheeks flushed pink as she replied hesitantly, “It does feel nice, and I guess I’ve gotten used to showing off my legs. I just hope I don’t scare off your brother. He might think I’m being a bit too bold to dress so provocatively.”

“You don’t need to worry about that. He’s a man and if he’s a gentleman, he’ll appreciate your beauty without making you uncomfortable. Let’s not keep him waiting,” I insisted, holding her hand and leading her out.

Steve did a double-take, drinking in Mom’s beauty before he composed himself enough to say, “You look lovely tonight, Lydia. I’m so glad you accepted my invitation again.”

His charade as her date brought a smile and a soft giggle from Mom as she linked arms with him and headed to the car.

During the drive, I glanced in the mirror and smiled, noticing Steve’s arm wrapped around her, his hand firmly clasping her bare upper arm.

As we approached the door of the restaurant, I took in the walkway leading to the path along the river. It was the main reason I had chosen the venue, and I silently hoped Steve would follow through with my plan.

The date went as well as the previous night, with Mom appearing to be much more comfortable, almost as if she were on a real date, with someone other than her son. As we exited, I hesitated at the fork.

Picking up on my pause, Steve took his cue and suggested, ‘Lydia, would you mind taking a stroll with me along the river? It’s a beautiful, warm evening, and I can’t think of anyone I’d rather be with.’

“I’d love to, Steve,” Mom readily agreed.

I walked behind them and per my previous instructions, Steve wrapped his arm around her waist, pulling her closer as they walked side-by-side. After a few feet, Mom reciprocated, holding his waist. Their hands gripped each other’s sides as they slowly strode down the scenic walkway. At the end, they stopped and Steve gently turned Mom to face him.

“Lydia, I want to thank you for a special night,” he whispered, leaned over, and pecked her on the lips. Mom’s eyes opened wide, but she didn’t jerk away.

When he pulled back, her arms wrapped around and hugged him, her face within inches of his. “You’ve made our night very special. Thank you so much,” she whispered and kissed him. It was a gentle, soft kiss, not an open-mouthed one—she dared not cross that boundary. After a moment, she pulled away. I turned and escorted them back to the car, grinning widely at how well the date was proceeding, knowing the best part was yet to come.

Ten minutes into the drive, Mom let out a sharp yelp, quick and high-pitched, reminiscent of a bird’s chirp. Acting alarmed, I asked, “Everything okay back there? Should I pull over?”

“No, dear,” Mom answered. “We’re fine.”

Looking into the mirror I saw Mom’s blushing face and I knew exactly what had happened. Steve had followed my instructions to a T, placing his hand on Mom’s bare knee before proceeding up her bare leg, stroking her smooth thigh. I only hoped she didn’t swat him away or become angry. My fears dissipated when I looked in the mirror again and saw that Mom’s expression had turned joyful, her wide smile reflecting her approval.

When we arrived home, we decided to head to bed after the long day. An hour later, when I snuck into Steve’s room, he was horny again and took me doggy-style, my favorite position, as it allowed his cock to scrape across areas normally not touched.

I had cum twice and when I heard his gasping become louder, I thought I’d soon feel his cock erupting. Instead, he pulled out, flipped me onto my back, gripped my knees, and pushed them forward until they were snug against the sides of my tits. He slammed in deeply, pushing my knees upward, elevating my pussy for perfect alignment.

Another orgasm hit me after only a few strokes, which only invigorated him to slam into me harder. Beads of sweat dripped from his forehead as he put all his strength into banging my battered pussy. Once again, I was in sexual nirvana as my brother manhandled me in the way I loved most. I couldn’t have stopped him if I wanted to—which of course, I didn’t.

Feeling his prick swell and his breath stop as his body stiffened, my pussy convulsed with an explosive orgasm. It was enough to trigger his own climax. His prick gushed torrents of cum, flooding my pussy and filling the room with the sloshing sounds of sloppy sex. My pussy continued to quiver and squeeze his prick tightly, even after his balls had drained their payload. Relief swept through his face as his pent-up lust had been unleashed upon my body.

A fleeting hint of remorse crossed his face, prompting me to refrain from questioning him about his horny state. I’d read enough porn to know that all boys fantasize about fucking their mothers and he was no different. It didn’t help that her body was so fucking hot. Throw in the activities of the dates I’d orchestrated for them, it was no wonder he was horny. I was confident he loved me as much as I did him—there was no jealousy. In fact, I found it hot that he might be thinking about his own mother—an act more taboo than a brother fucking a sister.

We kissed, snuggled together, and fell asleep in each other’s arms.


As soon as Steve headed out to tend to the yard after breakfast the next day, Mom turned to me, her expression clearly signaling her need to discuss the previous night’s date. In a concerned tone, she asked, “Do you remember when I let out that shriek last night on the way home? Steve actually placed his hand on my bare leg and stroked it. Can you believe he’d do that to his own mother?”

“Mom, he was staying in character, just like we instructed him,” I explained. “It was for your benefit so you’d become used to a real date. There isn’t a man alive who wouldn’t be tempted to touch your shapely legs. Did you remove his hand?”

“Actually, I wanted to but I couldn’t,” she replied, her voice tinged with shyness. “I’ve missed a man’s touch for so long and it felt so heavenly, that I selfishly allowed him to continue. Am I a bad mother for encouraging my son to fondle my leg?”

“Of course not,” I retorted. “It’s just harmless touching. It wouldn’t bother me in the least.”

She considered my argument for a moment, her expression softening in acceptance before she asked, “What about when he kissed me?” Do you think he was still role-playing or did he really want to kiss his mother?”

“Even taking it slow, it’s normal for a couple to kiss on the second date,” I reasoned. “You’re lucky he didn’t French kiss you as I would’ve done. Romance might move a bit faster these days than it did when you were dating, but you’ll be fine. I think you did really well.”

Satisfied with my answers, she changed topics. We chatted a bit longer before attending to the Sunday chores.

After dinner and our showers, I helped Steve with his studies, which involved brother and sister fucking like rabbits. During our recovery, I explained to him in detail how I wanted him to proceed with assisting Mom.

After another hour, I joined Mom in the living room, carrying our usual nightly cups of tea. We settled on the couch together, chatting easily while the TV blared unnoticed in the background.

Eventually, our attention shifted to a sitcom, and halfway through, Steve walked in wearing his sweats. Mom giggled and teased, “Hi, stranger. Come to see how the other half lives?”

“I’m mostly caught up and thought I’d hang out down here until it’s time for bed. Mind if I join you?” he asked, his expression practically begging for approval.

When I scooted over, making space for him between Mom and me, I ensured my robe slid several inches above my knee. “Have a seat and relax, Bro. You’ve earned it.”

As he flopped down onto the couch, I handed him my cup of tea with a grin. “Here, take a sip. Don’t worry—I made sure there are no sister cooties in it.”

He took a gulp and remarked, “Tasty. You two really know how to wind down an evening. I might have to make this a habit.”

“We’d love that, dear,” Mom replied, her voice tinged with excitement.

Our focus shifted to the screen as we settled in comfortably. The atmosphere of the room reverberated with joyful laughter as the three of us immersed ourselves in the moment.

During one of the more comical interludes, Steve slapped his hand on my knee as if by accident. Rather than removing it, he slowly advanced, exploring a few inches before moving back to my knee. Mom periodically glanced at his actions but didn’t object.

Instead, she shifted positions to become more comfortable, resulting in exposing six inches of bare flesh above her knee. She pressed her leg against Steve’s and not missing a hint, my brother dropped his other hand on Mom’s knee.

His hands never ventured more than a foot above our knees, careful not to proceed too quickly for Mom’s sake. Before it became too obvious he was inappropriately groping his mother and sister, I rose and bid them goodnight.


My life was at its peak, and I had never been happier. My enthusiasm carried over into my work, where I thrived, with my manager entrusting me with new responsibilities each day. But everything came to a halt Thursday afternoon when I was called into the office.

That evening, after dinner, my brother and I lay face-to-face, our nude sweaty bodies relaxing after satisfying our carnal desires. Building up the courage to discuss my latest dilemma, I began, “Steve, I need to discuss something with you about work.”

“Sure, Sis. I’m all ears,” he replied, his innocent, genuine expression warming my heart and making it even harder to continue.

“My manager approached me today and suggested I take on the assistant manager role. She wants me to help open a new store,” I explained, pausing to gauge his reaction. “It’s at that new mall by the state capitol building.”

His face fell, sorrow flickering in his eyes as he fought to hold back tears. “That’s three hundred miles away—too far to commute back and forth,” he said, his voice trembling and uneven.

“I know,” I admitted, trying to mask my disappointment. “That’s why I told her I’d probably turn it down and remain at my current job.

“I’ve seen how happy you’ve been this past week with the extra responsibilities, and it’s a big step up,” he argued, though his tone lacked conviction. “I’m not sure you should let it go so easily.”

“You might want me to leave after I come clean. Do you remember when I first began coming into your bedroom, wearing my skimpy shorts and tight top?” I asked, nervously watching his expression.

Before he could answer, I continued, “It wasn’t because I was bored. Ever since I was expelled from college, I’ve had the feeling that Mom gave up on me and focused all of her attention on you, since you stayed in school. I became so jealous that I decided to flirt with you, so hopefully you’d go out with a young, horny coed and allow your grades to slip. It was a terrible thing to do, and I’m truly sorry. But the more time I spent with you, the more I fell in love. I understand if you can’t forgive me, but please know that I love you—with all my heart.”

He flashed a wide grin and said, “First off, let me tell you, Mom doesn’t hold that against you at all. When we’re alone, she always tells me how proud she is of you for pursuing a career that suits you perfectly. Honestly, if anyone should have been envious, it’s me.”

“Wow, I had no idea she felt that way,” I admitted, a wave of relief washing over me. “I misread her teasing, and that’s on me. But it doesn’t change the fact that I tried to sabotage you.”

“Actually, it couldn’t have worked out any better,” he retorted. “Do you remember when I took Denise to the prom and never called her again or went out with anyone else? That’s because I had already fallen in love with you and it felt like I was cheating on you, going out with another woman. I was ecstatic when you started showing up in my room and to tell you the truth, I never needed help with my studies. I made that up so you’d continue seeing me. You see, I’m just as devious as you, but in the end, it worked out for both of us.”

Relief washed over me as the weight of guilt was finally lifted. “I guess it was destiny after all. That settles it—I’m convinced the right decision is to stay here with the ones I love.”

Steve’s eyes narrowed in thought, his expression suddenly brightening, like he’d just cracked the solution to a complex math problem. “I think you should accept the new position. It’s a once-in-a-lifetime opportunity that’s perfect for you,” he declared, his voice steady and resolute. “I don’t want you to ever settle for the status quo.”

“I won’t choose a job over you. Don’t you want to keep our relationship going?” I asked, my lower lip trembling as I fought back tears.

“That’s just it,” he replied, his voice filled with excitement. “This is exactly the opportunity we’ve been waiting for. You’ll get your own place, and I’ll transfer to State next year. Then we can live together without sneaking around anymore. We’ll finally live like a husband and wife—sharing a home, sleeping beside each other every night, and displaying our love openly. It’s everything we’ve dreamed of. Sure, it’ll be tough at first, being apart, but the end result will make it all worthwhile.”

Seeing the pure joy on his face warmed my heart. He had thought it all through, and it made perfect sense. I couldn’t help but giggle, a little too loudly.

“What’s wrong? Don’t you like my idea?” he asked, his tone tinged with worry.

“No, I love your plan,” I gushed, leaning in to kiss him softly. “I just think it’s funny—I was dreading telling you, convinced my life was falling apart tonight, and somehow, you’ve turned it into the best night of my life. I love you so much. I’ll accept the position tomorrow.”

“Terrific!” he exclaimed. “When are you going to tell Mom?”

“Tomorrow night,” I replied. “I still have a few things to sort out before I talk to her about it. I just hope she’ll understand.”

“She will. Mom’s always supported your decisions,” he said with confidence.

“You’re right. Speaking of Mom, I’d better get downstairs and keep her company. See you in a bit?” I asked with a smile.

“Wouldn’t miss it,” he said, grinning back.


Later that evening, as I snuck down to my brother’s room, I thought of our future where this would no longer be necessary. He was already in bed, nude when I shucked off my robe and crawled under the covers. We kissed and gently held each other. I loved allowing him to pick our position, but after he didn’t make the first move, I asked, “What’s the matter, sweetie? Are you changing your mind about me leaving?”

“Of course not. You know what I’d really like to do tonight? Fucking you always wears me out, putting me out right away. I want to stay awake as long as I can, talking, hugging, and kissing you. I want to create special memories of our time together for when we’re apart. Do you mind?” he asked.

“I love it,” I replied, snuggling up to him. “It amazes me how well you know what pleases me.”

For hours, we connected and if possible, bonded even closer. It was the most romantic night of my life and we didn’t even have sex. I made a vow to have more nights like that in the future.

At breakfast, Mom asked, “It’s Friday. Where are we going out to eat tonight? That last place by the river was something else.”

Steve shot me a curious glance, clearly wondering how I’d handle the moment.

“I’d like to stay home tonight, Mom,” I said. “I have something to talk to you about, and I think it’s best if we’re comfortable here when we do. Would that be okay?”

“Sounds good, Mia,” Mom replied easily. “Let’s order pizza so we don’t have to worry about cooking.”

“Fantastic!” Steve chimed in enthusiastically. “Dibs on the pepperoni and sausage!”

We all laughed, finishing breakfast in high spirits before heading off to work and school.

The day passed in a blur as I made arrangements and received last-minute instructions from my manager. Once home, I stowed the outfits that I had ordered for Mom, and fortunately arrived on my last day. I also purchased a few nighties for her, something of a farewell gift.

After dinner, we gathered in the living room, Mom seated on one side of me and Steve on the other. Taking a deep breath, I began, “Mom, I’ve been offered a big promotion—assistant manager—but it means I’d have to move across the state. I think it’s the right step for me, and I hope you’ll understand that I didn’t make this decision lightly.”

Mom sat quietly for a moment, clearly processing what I’d just shared. Then, she reached for my hand, smiled warmly, and said, “Mia, if this is what you want, then absolutely go for it. I think it’s wonderful that they recognize your potential. I’ve always believed you’d do great things. How soon do you have to leave for your new job?”

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