The steprob's massive morning erection stirs his stepsister from her sleep. She smirks, pushing him back onto the bed and straddling him. He groans as she grinds her wet pussy against his cock, their bodies slick with sweat. She leans down, her breasts brushing against his chest as she whispers, "I want you to cum inside me." He growls, flipping her over and thrusting into her, their bodies moving in sync. She claws at his back, her pussy clamping down on his cock as she comes, her juices mixing with his cum as he fills her.