When David and Katie hear their stepmom, Summer, fucking someone in her bedroom, they cant help but listen. Hearing their mothers moans as she gets fucked makes the stepsiblings horny, too. Katie and David have already been fucking in secret, and this is the perfect opportunity for them to get into it. Katie is a freaky little thing, so the idea of getting fucked by her stepbrother while they listen to their stepmom have sex is beyond enticing. Unknown to them is that Summer has been hooking up with another woman. Summer and Sophia have been all over each other, and their secret is about to be exposed. David and Katie crash through the door and stumble onto the bedroom floor mid-fuck. Stunned to see her stepson and stepdaughter lying on her bedroom floor, partially naked, Summer is intrigued. Shes in a horny state of mind, and she wants them to show her and Sophia exactly what they are doing. What started as already a taboo moment turns into a full-blown group fuck sesh. David has his work cut out for him, but hes ready to give all of these babes the ride of a lifetime.