When Joyce's free-spirited sister, Madi comes to visit, Mel couldn't be happier since his separation from Joyce means Madi is no longer his problem. But that doesn't stop Madi from getting in Mel's head. She suggests that the woman he's dating, Allison, is burdened with having to take care of her blind boyfriend, so Mel sets out to prove her wrong. Meanwhile, it's Runyen who gets in Henry's head, convincing him that he and Jenny are spending so much time together, they've fallen into the dreaded friend zone.