Mery513, my curvy step-sister, was prancing around in her lacy pink panties, thinking I was engrossed in my camera. But my lens was fixed on her full, round ass, my cock throbbing in my pants. When she caught me, she didn't get mad. Instead, she demanded I show her what I'd been hiding. I obliged, revealing my thick, veiny cock. She bit her lip, pushing her panties aside, and ordered me to fuck her hard and deep. I grabbed her hips, slamming into her tight, wet pussy, her massive ass bouncing with each thrust.