義理の妹はリビングルームで私とふざけていただけだったけど、彼女はムラムラして、私はソファで彼女とセックスした

Step brother and stepsister are sitting on the couch watching TV. Suddenly step bro starts to playfully touch his step sister, and she starts touching his dick in response. Everything turns into sex and the step sis jumps on her stepbrother's big dick