I showed up at my sister's place right on time, eighteen and already hard just thinking about what might happen. She needed a sitter for the weekend, but her stepson Jake was home from college too, twenty and built like he lifted every day. The second she left, the house felt different.
Jake didn't waste time. "You always this quiet when you're supposed to be watching kids?" he asked, leaning against the counter, eyes dropping straight to my tits.
"They're asleep," I said, voice low. "And I'm not really the quiet type."
He grabbed my wrist and pulled me into the living room. No slow shit, no talking about feelings. He shoved me onto the couch, yanked my shorts down, and buried his face between my legs like he'd been starving. His tongue was rough, licking my pussy in long, wet strokes, sucking my clit until I grabbed his hair and ground against his mouth.
"Fuck, you taste like trouble," he muttered, then stood up and dropped his jeans.
His cock was thick and already leaking. He didn't ask. He just pushed my knees apart and slammed into me in one hard thrust.
I bit my lip to keep from moaning too loud. The kids were upstairs. That only made it hotter. Jake fucked me like he wanted to wreck me, hips snapping, balls slapping my ass every time he bottomed out. "You like that, little babysitter slut? Getting your cousin's dick while you're supposed to be responsible?"
"Harder," I hissed back. "Don't fucking stop."
He flipped me over, pulled my hips up, and drove in from behind. One hand reached around to rub my clit while the other slapped my ass. The couch creaked under us. Sweat ran down my back. Every thrust pushed a grunt out of me I couldn't hold in.
When he pulled out and spun me around, I dropped to my knees without being told. I sucked him deep, tasting myself on his cock, gagging when he held my head and fucked my throat. Spit ran down my chin onto my tits. He came with a low groan, pumping thick ropes across my tongue and lips. I swallowed what I could and licked the rest off his shaft.
We weren't done. He dragged me upstairs to the guest room, bent me over the bed, and fucked me again, slower this time but just as filthy. He told me exactly what my pussy felt like, how tight it was, how he was going to fill it next time. I came hard around him, shaking, biting the pillow so the kids wouldn't wake up.
By morning we were still going, raw and messy in the shower, his fingers in my ass while he pounded me against the tiles. When my sister came home she had no idea her stepson had spent the whole night using the babysitter like his personal cumdump.
We already had plans for next weekend.
