Stepsibling threesome with a milf therapist and her patient

A young guy and his stepsister have a weird relationship, to say the least. He's always been a bit too close for comfort, and their interactions have always been a bit... strange. To address this, their parents enroll him in therapy with their stepsister, a sultry milf therapist. During one session, things take an unexpected turn when she starts to seductively touch herself in front of him. Unable to resist, he drops to his knees and starts sucking on her big tits. The taste of her skin sends him into a frenzy, and soon he's licking her pussy as well. Their stepsister returns to the room, catching them in the act. Instead of being upset, she joins in, leading to a wild threesome with the three of them. The group moves to the dorm, where they continue their steamy encounter, with the stepsister getting her pussy eaten by the lucky guy while the milf therapist watches. The action intensifies as they all take turns fucking and getting fucked, culminating in a satisfying finish.