Amateur Wife's Sister Tempts Me with Her Tight Ass

My wife's sister stays in my room, her tight body barely contained in skimpy clothes. She's an amateur tease, always lingering in my personal space. One night, as I'm masturbating to porn, she walks in, feigning surprise. She leans over, showing off her ass, and asks me to help her with something. I follow her to the bathroom, my heart pounding. She turns to me, licking her lips, and says, "I've always wanted to try anal. Will you help me?" I'm rock hard, but I hesitate. She pushes me against the wall, her hand rubbing my cock through my pants. "Come on," she whispers, "I know you want it." I give in, my hands exploring her body as she begs me to fuck her ass.

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