After a hefty night of partying, I found myself in my curvy step-sis' room, ready to feast on her luscious ass. She's always been a bit of a tease, but this time, she decided to take it to the next level. She bent over, presenting her fat ass to me, and before I knew it, I was diving in, licking and sucking on that juicy ass. The taste of her, the feel of her skin against my tongue, it was heavenly. But she wasn't done yet. She had more in store for me. She told me to fuck her, and I did, my cock sliding into her tight ass, hitting that sweet spot. I fucked her hard, my thrusts getting deeper and harder, her moans growing louder and louder. And when I finally let go, I filled her ass up with my hot load. It was the best night of my life, and I knew it was just the beginning.