is further revealed when she awkwardly reacts to Nancy being bisexual. It's time for this sheltered small-town college girl to expand her horizons. Casey and her husband, Shane, are waiting for Shane's stepmother, Marilyn, to arrive. Shane's excited to see his stepmom, though Casey, on the other hand, is a little nervous about it. Whenever they're in the same room, it always seems like Marilyn is competing with Casey over Shane's attention. Marilyn arrives, and greets Shane with a kiss on the lips. Casey is taken aback by this but doesn't call them out on it. When she spots them caressing each other sensually on the couch, she can't hold her tongue any longer. "What the FUCK are you doing?" she demands. Shane pulls away from his stepmom. Marilyn, on the other hand, doesn't feel like she needs to hide anything, and proudly declares that she and Shane are sexually involved. Casey takes this all in and then realizes that no matter what she does, Shane will always crawl back to Marilyn. And if she can't compete with Marilyn, then maybe she can join her and Shane in their lovemaking.