When goody-two-shoes Penelope secretly drops out of school to spend her days at her boyfriend’s place, her stepbrother Joshua catches her red-handed. But instead of ratting her out, he cuts her a deal: her secret’s safe with him as long as she’s willing to return the favor or two. What starts as a harmless little arrangement quickly spirals into a series of wild, over-the-top “family bonding” shenanigans that neither of them could’ve seen coming. The two reach their kinky peak when Dee, their unsuspecting mother, drives Joshua and Penelope without realizing the two are literally fucking behind her back.