My stepdad's eyes gleam with lust as I bend over, presenting my tiny asshole to him. He slaps it, causing me to yelp, then spits on the puckered hole, rubbing it in with his thumb. His cock, already hard from watching me play with my pussy, presses against my ass. I tense, but he's gentle, pushing in slowly, allowing me to adjust to his size. Once he's fully seated, he grabs my hips, pulling me back onto him as he thrusts forward, fucking me hard and deep. I cry out, feeling my ass stretch around him, the slight burn intensifying my pleasure. He fucks me like this, my small body bouncing on his cock, until I'm begging for more, my own hand between my legs, rubbing my clit frantically.