Two teenage stepdaughters find themselves in a precarious situation when their father brings home a new girlfriend. The girls, initially irritated by the intrusion, soon realize that their stepdad's new lady is not who they thought she was. As it turns out, she's more of a wild card than they ever imagined. When they're left alone with her, the girls decide to play a prank on their stepdad, but things quickly escalate. The new woman, intrigued by the idea of being with both men, persuades the girls to join her in a steamy encounter. What starts as a harmless joke soon becomes a heated threesome involving their stepdad's best friend. The girls, initially repulsed by the idea, find themselves caught up in the moment, exploring their desires with a much older man.
