"after you come back from the store, you find your sister on the couch watching a movie and eating popcorn, you hand her the bag of chips she told you to get when you left, she almost doesn't notice you" Huh? Oh Finally. go grab me a drink from the fridge, lazy ass. "Grabbing the drink, you sit with your sister, mom and dad are both away on a business trip, so its just you two here for the next 3 weeks"

"Noticing you are deep in thought, Eileen nudges you with her elbow."

"Hey, what's on your mind? You've been quiet since you got back from the store. Don't tell me those chips took all your energy?"

"She smirks and takes a sip of her drink."

"Eileen raises an eyebrow and looks you up and down, her eyes lingering on your muscular physique."

"I can tell. Your body is looking pretty good," "she says with a slight smirk." "Maybe you should teach me a thing or two about working out sometime."

"She takes another sip of her drink and leans in closer to you," "But maybe we can find something else to do for now?"

"Eileen trails her finger down your arm, a sly smile playing on her lips."

"I was thinking we could have some fun together. We have the house to ourselves for the next three weeks, why not take advantage of it?"

"She leans in closer and whispers in your ear," "I know you've been curious about my size. Maybe I can give you a taste of what it's like."

"Eileen chuckles and moves her hand to your thigh, giving it a squeeze as she meets your gaze."

"Yes, I am your stepsister, but that doesn't mean we can't have a little fun, does it?" "she says with a coy smile."

"As for my size, well, let's just say I'm bigger than most guys. You know what I mean," "she adds, winking at you."

"Eileen smirks as she feels your hand on her thigh."

"In every way possible, little brother. My tits are bigger than yours, and my cock is definitely bigger than yours," "she says with a wink."

"Don't tell me you've never been curious about what it would be like to get fucked by a girl with a big dick?"

"Eileen gives you a wicked grin as she moves her hand up your thigh."

"Of course I do. Didn't you know? Being a futanari, I have both a cock and a pussy," "she says with a seductive tone."

"You seem surprised, little brother," "she adds with a chuckle." "Don't tell me you've never fantasized about it before?"

"Eileen smirks at your reaction, enjoying the teasing."

"Well now you do, little brother," "she says, leaning in even closer to you."

"And I have to admit, I've been thinking about what it would be like to have some fun with you while our parents are away. What do you say? Are you up for some taboo fun?"

"Eileen grins at your response, taking it as a sign that she's getting through to you."

"I knew you would be. And I promise you won't regret it," "she says with a wink." "Why don't we start off slow and see where things go?"

"She leans in, her lips brushing against your ear as she speaks," "Trust me, little brother. You're gonna love what I have in store for you."

"Eileen nods, her grin still present on her lips."

"Of course. We'll take it slow," "she says reassuringly." "No need to rush into anything."

"She takes a sip of her drink and leans back on the couch, crossing her legs as she gives you a sultry look."

"Who knows? Maybe we'll discover something new that we both enjoy."

"Eileen chuckles as she sees you blush."

"Well, little brother, that's a good start," "she says, giving you a wink."

"But if you're curious about what I look like naked, we'll have to do a lot more than just talk about it," "she adds with a seductive grin." "Maybe we can explore each other's bodies together and see what other things we like?"

"Eileen notices your hesitation and decides to play it cool."

"Hey, no rush. We have plenty of time to explore together," "she says in a reassuring tone." "But when you're ready, just know that I'm always here, ready and waiting for you."

"She puts a hand on your thigh and leans in closer," "And who knows? Maybe you'll surprise yourself with what you end up liking."

"With that, she pulls back and picks up her drink again." "In the meantime, let's just enjoy our time alone together. We have three whole weeks after all."

"Eileen tilts her head and sees the look in your eyes. She smirks as she gets up from the couch and stands in front of you."

"Is that what you want, little brother?" "she says in a low voice, her hand resting on your cheek as she leans in closer." "Do you want me to dominate you and show you what it's like to be with a futanari?"

"She runs her other hand down her body, tracing the curves of her hips down to her crotch. Her fingers brush over her cock, which is already starting to harden in response to your gaze."

"If that's what you want, then you just have to ask," "she murmurs with a seductive grin."

"Eileen's grin widens at your response as she takes a step closer to you."

"Good boy," "she purrs, tracing her finger along your jawline." "Now just relax and let me take care of everything."

"With that, she pulls off her tight shirt, revealing her full, round breasts. She tosses the shirt aside and unbuttons her shorts, sliding them off to reveal her cock, already fully erect."

"I'm going to make you feel so good, little brother," "she whispers, crawling on top of you and pressing her cock against your thigh." "Just let me show you what it's like to be with a big, beautiful futanari."

"Eileen chuckles at your reaction to her size, taking pride in her body."

"Of course it's big, little brother. After all, I am a futanari," "she says, stroking herself as she gazes down at you." "But don't worry, I'll make sure you can handle all of it."

"She leans down and whispers in your ear," "Just sit back and enjoy the ride."

"With that, she pushes you down onto the couch and climbs on top of you, positioning herself between your legs. She takes hold of your waist with one hand and guides herself towards your waiting entrance with the other."

"Ready?" "she asks with a lustful grin."

"Eileen leans in closer to you, her warm breath tickling your ear as she responds."

"Of course, little brother. Nothing gets me more excited than feeling a tight little ass wrapped around my cock."

"She runs her hand down the small of your back, tracing circles as she continues."

"But don't worry, I'll make sure it feels good. You just have to relax and let me take care of everything."

"With that, she positions herself behind you and slides her cock inside your waiting hole, taking it slow at first to ease you into the feeling."

"How does that feel?" "she asks, her breath hot against the back of your neck."

"Eileen immediately stops and pulls back slightly."

"Sorry, sorry. I went too fast," "she says, her voice filled with concern." "Here, let me take it slow."

"She starts with gentle thrusts, slowly working her way deeper as she gives you time to adjust to the feeling. She places a hand on your waist, holding you close as she leans in and kisses the back of your neck, trying to help you relax."

"Just breathe, little brother. It'll feel better soon," "she whispers, her voice reassurance as she continues to move inside you."

"Eileen chuckles softly, her breath hot against your neck."

"I knew you would, little brother," "she says in a low voice, starting to thrust harder and faster now that you seem to be enjoying it." "You're going to love riding my big, beautiful cock."

"She wraps one arm around your chest and holds you tight as she continues to pound into you, driving you both towards the edge of pleasure."

"Tell me how it feels," "she whispers into your ear, her voice filled with desire." "I want to hear you moan and beg for more."

"Eileen grins to herself as she hears the desperation in your voice, feeling her own arousal growing with each moan you make."

"Say it again," "she whispers, placing a kiss on your neck." "Beg me to fuck you."

She begins to thrust even harder, each movement driving her cock deeper into your body. She can feel herself getting closer to the edge, but she wants to hear you beg for just a little bit longer.

"C'mon little brother," "she urges," "beg me to keep fucking this tight little ass of yours."

"Eileen moans along with you as she continues to pound into you, her own pleasure growing with every thrust."

"That's it, little brother," "she whispers between moans," "you sound so good begging for more. And I'm not going to stop until we both come together."

She picks up the pace even more, her hips slamming into yours with each thrust as she works to bring you both over the edge. Her hand reaches around to your cock, stroking it in time with her thrusts, knowing that getting you off will push her closer to her own orgasm.

"Come for me, little brother," "she urges," "let me feel you tighten around me while I fuck your ass."

"Eileen smiles and grips your waist tighter as she starts to thrust even harder, her hips slamming into yours with each movement."

"That's it little brother, take my cock deep inside you," "she whispers into your ear." "I'm going to make sure you come so hard while I fuck your tight little ass."

She reaches around to stroke your cock in time with her thrusts, feeling you grow harder with each passing moment. Her own pleasure is growing too, and she knows it won't be long before she reaches the edge.

"Are you ready to come for me, little brother?" "she asks, her voice rough with desire." "Let me feel you release all over my hand while I pound into you."

"Eileen takes in a sharp breath as she feels her own pleasure building, hearing your words push her closer and closer to the edge."

"That's it, little brother," "she says in a low voice," "let go for me. Come on my hand while I pound into you."

She picks up the pace even more, her hips slamming into yours with each thrust as she works to bring you over the edge. Her own orgasm is approaching quickly, and she knows that once she hears you come undone, she won't be far behind.

"Cum for me, you little bitch," "she growls, her voice filled with desire." "Let me feel you explode while I fuck your tight little ass."

"Eileen grips your waist tighter as she feels you starting to shake and convulse around her, your body tightening up as you hit your orgasm."

"That's it, you little bitch," "she growls, feeling her own pleasure building with each passing moment." "Cum all over my hand while I fuck your tight little ass."

She feels herself approaching the edge as well, her cock tenting between your cheeks as she works to bring you both to the peak of ecstasy. She speeds up her thrusts even more, pounding into you harder and faster until finally she can't hold back any longer.

With a loud moan of pleasure, Eileen comes deep inside you, her hips bucking wildly against your body as she empties herself into you. She collapses on top of you, her breathing harsh and ragged as she starts to come down from the high

"Eileen nuzzles into your neck, breathing deeply as she comes down from her own orgasm. Her hand strokes gently over the small of your back, trying to soothe you as you come down from your high."

"That was so good, little brother," "she whispers," "you felt so tight and hot."

She pulls out of you slowly, letting her cock slide free from your body with a soft gasp. She rolls onto her side, pulling you close to her as she wraps her arms around you. You can feel her cock still twitching against your thigh as she holds you tightly.

"I'm sorry if I hurt you, little brother," "she says softly." "I couldn't help it, you felt so good."

She presses a soft kiss to your cheek, holding you close as you both come down from the intensity of the moment.