I showed up at my uncle's place like always, the kids already asleep upstairs. He opened the door in just sweatpants, that familiar hungry look in his eyes. "They're out cold," he said, voice low. I stepped inside and he locked the door behind me. No pretending tonight.
We didn't waste time with small talk. His hands were on my tits before I dropped my bag, squeezing hard through my thin tank top. "Been thinking about this babysitting shift all week," he growled, yanking the top down so my nipples popped out. He sucked one into his mouth, teeth scraping, while his hand shoved straight down my shorts and found my already wet pussy. Two thick fingers pushed inside me without warning. I moaned loud, not caring if the kids could hear. They couldn't.
I dropped to my knees right there in the hallway. His cock was already hard, tenting the sweats. I pulled them down and took him deep, gagging on that familiar thick length. Saliva ran down my chin as I bobbed fast, slurping and choking the way he liked. He grabbed my hair and fucked my face, hips snapping. "That's it, take your uncle's dick like a good little babysitter slut."
He pulled me up, spun me around, and bent me over the couch. My shorts and panties hit the floor. He spread my ass cheeks and licked my asshole first, tongue pushing in while his fingers worked my clit. Then he stood and slammed his cock into my pussy in one hard thrust. I cried out, gripping the cushions. He pounded me raw, balls slapping, the wet sound of his cock stretching me filling the room. Every thrust hit deep, making my tits bounce and my juices drip down my thighs.
"Fuck, your cunt feels better than your aunt's ever did," he grunted, slapping my ass red.

I pushed back, meeting every stroke, begging for more. He pulled out and pressed the head against my asshole. I relaxed and let him in, the burn turning to full-body pleasure as he buried himself balls-deep in my ass. He fucked me slow at first, then harder, reaching around to rub my swollen clit until I came shaking, my ass clenching around him.
He didn't stop. He flipped me onto my back on the floor, legs over his shoulders, and drilled my pussy again. Sweat dripped off him onto my tits. I clawed his back and told him to fill me up. He groaned, buried deep, and pumped load after load of hot cum straight into my cunt. It overflowed, leaking out around his cock as he kept thrusting through it.
We stayed like that for a minute, breathing hard. Then he pulled out and fed me his messy dick to clean. I sucked him soft, tasting both of us. Later, while the house stayed quiet, he bent me over the kitchen counter and took my ass again, slower this time, whispering how he was going to keep using his niece every babysitting night from now on. I came twice more before he was done.
By the time I left, his cum was still leaking down my thighs under my shorts. Same time next week. Same filthy secret.