Threaten

Still trembling from the overwhelming sensation of being stuffed full, you look up at Jimmy’s flushed, perverted face and **** out the words between shaky moans:

"Y-you dork... if you dare cum inside then I’ll take mom’s 'b-plan' pill... and no chance I let you anywhere near this body again in the 40 hours left!"

Your voice comes out far more breathy and girly than you wanted, undercut by the way your tight pussy involuntarily squeezes around his thick cock.

God, I sound like I’m bargaining with my own little brother while he’s balls-deep inside me... But I have to threaten him. If this nerd floods my womb I’m fucked forever. No more soccer, no more guy life... just a knocked-up little sister.

Jimmy groans loudly, his chubby hips still making small, lazy thrusts that make your perky C-cup tits jiggle. His fat cock drags along your sensitive inner walls, the head bumping repeatedly against your cervix.

"Haaah... b-plan pill? That’s... that’s cheating, sis..." he pants, clearly not happy with the threat, but too turned on to stop moving. "But fuck... your pussy feels way too good right now. It’s so hot and wet... like it’s trying to suck the cum out of me..."

He leans down, his soft belly pressing against your flat tummy as he gropes one of your soft tits, pinching the stiff pink nipple. His hips start moving faster — deeper, more insistent strokes that make wet plap-plap-plap sounds every time his heavy balls slap against your plump ass and leaking butthole.

"Nngh! S-slow down, you idiot!" you moan, but your smooth legs instinctively wrap around his waist a little tighter.

Jimmy’s voice is thick with lust and slight panic at your threat. "But sis... your cute pussy is clenching so hard around me... look how your pink lips are stretched around my cock. It’s all creamy... And your tits are bouncing so nicely every time I thrust. How am I supposed to pull out when it feels this good?"

This is so humiliating... I’m threatening him while my own body is betraying me. My pussy is fluttering and drooling all over his dick like a **** slut. Every time he hits my cervix I feel my womb throbbing... begging for his load. I’m supposed to be the older brother, not some moaning girl getting railed by her chubby otaku sibling...

Your plump, smooth ass jiggles on the bed with every deep thrust. Jimmy’s cock is completely coated in your juices, making filthy wet sounds as he fucks you harder.

He suddenly buries himself to the hilt and grinds against you, stirring your insides while panting against your neck.

"I’m getting really close, sis..." he whines, voice shaky. "Your pussy is too perfect... it’s milking me... Can I cum on your tits instead? Or... maybe just a little bit inside? Just the tip of my load? I’ll pull out right after, I swear..."

His cock throbs powerfully inside you, dangerously close to the edge. You can feel every vein, every pulse against your sensitive walls.

Fuck... he’s right on the brink. One wrong move and he’s going to pump me full. My womb is right there... If he cums now, even the morning-after pill might not save me from this stupid curse... But why does the thought of him flooding me make my pussy clench even harder? This body is so fucked up...

You’re right on the edge of another orgasm yourself, your perky tits heaving, nipples rock hard, and your cute pink butthole still leaking his previous load onto the sheets.