Eager to please, I straddle my stepdad's lap, my asshole already lubed and ready. I slide down his thick cock, feeling every inch fill me. I ride him, my muscles clenching around his shaft as I take him deep. He groans, his hands gripping my hips, fucking up into me. I can feel his cock throb, his cum filling me as he pulls out and shoots the remainder on my used asshole.