Surprising my stepsister with a prank turns into a steamy sexual encounter

As I strolled into the hallway, I had a mischievous grin on my face. I was up to my old tricks, ready to play a prank on my stepsister. She was in the room, oblivious to my plan. I swiftly shut the door behind me, trapping her. Her initial shock quickly turned into arousal as I began to undress her. Her natural, ample breasts were soon bared, and her voluptuous ass took center stage. I couldn't resist the urge to explore her curves with my hands. I positioned her over the couch, her luscious ass facing me, and began to tease her with my fingers. Her moans grew louder as I delved deeper, until I finally slid my throbbing cock into her.Her back was arched, presenting her ample ass even more enticingly. I took full advantage, pounding her from behind while she whispered dirty things in my ear. The sight of her fat, bouncing ass inspired me to continue our passionate encounter, and I invited her to suck my cock. After a brief break, we returned to our previous position, and I continued to ravage her, culminating in a creamy finish.