Your mother erika is away on an extended business trip. She left you under the care of your older sister Saori, alone for a week. Saori arches her back exposing her huge jiggly ass towards you, without a care in the world. You can see strand of pubes and part of her anus exposed. Her thong barely covers her rear assets "Ohhh, baby brother. Could you come here and help me find something?" While she swings her huge ass in front of you and you watch with a face full of desire and lust Saori can't help but think "Oh, finally we are alone. I can't wait to corrupt his innocent mind~"

"Oh, you know...just something I saw on TV the other day. It's called an "ass-plug" and I thought it would feel nice to have one of those big ones in my tight little asshole." Saori whispers seductively, her hands sneaking down between her legs to finger herself before she even knows you're there. Her fingers disappear into the cotton of her panties, sliding over her moist folds and roughly rubbing against her clit. "So...can you find it for me baby brother?" She purrs, arching her back again to grind herself harder against your crotch.

"Umm...let's see...it's kinda long and hard, but flexible too. And it has this weird bulb shape on one end." Her words are slurred through moans as she continues to finger herself, getting closer and closer to orgasm. "Ohh~...yeah...I'd really like you to find it for me..."

blushes and tries to cover herself with her arm, suddenly self-conscious "I...ummm...well...it was on the nightstand before your mom left." She stammers, looking away bashfully. Her cheeks are burning red and her breathing is ragged as she fights against the desire to cum right here and now with you so close.

But then a thought occurs to her and her eyes light up. "Maybe if we find it...you could use it on me, Obito-kun? I'd let you...if you wanted..." She whispers, licking her lips nervously.

As you go through her belongings, Saori can't help but moan softly with every touch and sound she hears from your part of the room. Her body trembles in anticipation as she imagines what it would feel like to have you inside her...fucking her senseless with that "ass-plug" thing. The thought alone is enough to make her shudder with excitement.

But then, finally, your fingers close around the hard plastic of the object in question and she tenses up expectantly, eager for what comes next. Her heart races as you return to stand behind her once more, the toy dangling from your fingertips. She turns her head slightly, offering you a sultry smile before asking huskily, "Are you going to use it on me now, Obito-kun?"

Saori gasps as you slide the cool plastic inside her, filling her tight ass with its girth. "Oh God...that feels so good..." She moans, rocking her hips back against you in silent invitation for more. Her arms flail above her head, fingers curling into the sheets, as she arches her back to accommodate the strange intruder deeper inside of her. "More...give me more..." She pants between moans, her body trembling with desire and need.

Her body tenses as she feels the head of the ass-plug nudging against her griping ring, and then finally it gives way to pleasure so intense that she has to gasp for air. "Oh fuck...that's perfect..." She whispers hoarsely, beginning to rock her hips in short, quick motions against your hand. Her fingers dig into the sheets, curling into tight fists as she feels every inch of it stretching and filling her. "Don't...don't stop..." She pants between moans. "I want more...."

Her voice catches in her throat as you begin to thrust gently, the head of the ass-plug pressing against that sensitive spot within her again and again. She grinds her hips harder against your hand, moaning loudly now, lost in a haze of pleasure. Her breath comes in ragged gasps as she arches her back off the bed, offering you easier access to her throbbing sex. "Fuck...oh God...yess..." She pants desperately, her fingers clawing at the sheets beneath her. "Don't stop....Please don't stop..." Her thighs quiver and she tosses her head back, exposing the smooth column of her neck to your hungry lips and teeth.

"Fuck me harder, Obito-kun..." she moans, arching her hips into his thrusts. "Oh God, I need it so bad." Her nails dig into the sheets as she lets out a needy whimper, body trembling with desire and the oncoming pleasure crash. "You're making me feel so good..."

Her breath comes in ragged gasps as her inner muscles clench around the toy buried deep within her ass, urging him to go deeper still. "Don't stop...please," she pants, eyes squeezed shut, fingers curling into fists. "I want more..."

Her skin is flushed with arousal and desire as she begs for him to take what she's offering without restraint or mercy. She can feel herself on the edge of release, but the pleasure he's giving her is just too much to bear alone; she needs his touch, his voice...she needs him to make her come.