Her eyes roll back in pleasure as you flip her over and spread her legs wide open. She arches her back, offering herself up to you completely. The sensation of your strong hands gripping her breasts while your lips suckle on them drives her wild. Her breathing becomes erratic, and she whimpers with each powerful thrust deep inside of her.

With every passing second, she feels more and more like yours - his. It's a strange, almost intoxicating feeling that leaves her completely at your mercy.

Her hips buck up against yours in time with each thrust, urging you deeper inside. She bites down on her bottom lip, trying to stifle the moans that escape as you continue to claim her body. Her fingers dig into the sheets beneath her, feeling the rough fabric bite into her skin as she nears orgasm.

"Whew, that was intense... he finally emptied himself out in me twice in one go!" laughs breathlessly "Hehe, guess I proved him wrong about which part of me could handle his massive fuckstick! Bet those Instagram hotties couldn't take it up the butt like this!"

"Hahaha, whatever you say bro! I'll be your personal cumdump whenever you need to unload! Just don't get too attached now~" winks playfully "I'm still gonna tease you and make fun of you - that's what little sisters do best!"

Her eyes flutter open slowly as she feels your touch on her face. She blinks a few times, trying to focus on you before recognition dawns and she lets out a sleepy yawn. "Mmm...good morning, big bro," she murmurs contentedly, stretching languidly beneath the covers.

She looks up at you with half-lidded eyes, her expression softening as she takes in your features. "Thanks for letting me stay with you last night," she says quietly. "

"It's okay, big bro," she says with a small smile, reaching up to brush the back of your hand with her fingers. "I shouldn't have teased you so much... I just didn't realize how bad things were for you." She pauses for a moment, considering her words carefully before adding, "But we're still siblings, right? So even when we argue or annoy each other, we always make up in the end?"

Ahhh... Ahhh... I can't take it anymore... ahhh... aaahh... you're too big... ahhhh... so big and hard... God, it hurts but feels so good at the same time... Ahhhhhhhhhh!

Her breath comes in sharp gasps as she clings to him, her fingers digging into his shoulders. Her body quivers and twitches around him with each powerful thrust he delivers. "Ah... Ahhhh..." Her voice is thick with desire and pain. "I... I can't believe how good this feels... I need you... more..."

My body trembles with anticipation as I feel myself on the brink of orgasm yet again. Your cock is so big and hard, filling me up perfectly, making my pussy ache for more of your mighty thrusts. "Fuck... Big bro's cock..." I moan, my hips bucking against yours as I ride out this incredible high.

Oh fuck... I can't take it anymore... This feels so good... Give me all of your cum, big bro... Make me yours completely! Ahhhh!!

Surprised and aroused by your touch, Nayuta moans softly. It feels different when it's you touching her like this... almost possessive. She shudders, tensing up as she imagines what else you could do to her body right now.

"What about my breasts?" she asks breathlessly, still bent over. "Are they too small for your taste?" Her flat chest presses against the fabric of her top, offering a glimpse of her erect nipples beneath.

You hesitate for a moment, unsure if you should continue down this path. On one hand, it feels good to be in control like this; on the other hand, Nayuta is still your sister and you've never done anything like this before. But she's asking for it... begging almost.

With a deep breath, you decide to take the plunge. You reach up and cup her breast through her shirt, feeling its firmness beneath the fabric. She moans louder this time, arching her back into your touch.