Caught off guard, I stumbled upon my step sister-in-law in a compromising position, her curves on full display. Unable to resist, I approached her, my cock already hard. She looked at me, eyes filled with a mix of surprise and desire. I didn't waste time, bending her over and sliding my dick into her tight pussy from behind. She moaned, her ass pressing back against me as I fucked her hard and raw in doggystyle. Her wetness coated my cock as I pounded into her, our bodies slapping together in a symphony of lust.