Mike and Molly come home from dinner at Medieval Times, open the door and find Carl has brought a woman to Mike's apartment (Mike gave him an extra key years ago). Molly doesn't like that Mike did this, so they end up going to Molly's where they find Joyce, upset because she thinks Vince is breaking up with her. Molly has papers to grade so Mike ends up getting embroiled in the drama of house, but out of this, he ends up bonding with Joyce and Victoria and becoming a true part of the household. When Mike sees Carl again, Carl tells him that he's going to break up with the woman he's been fooling around with. Strangely, Mike doesn't like what Carl says and lectures him on treating women with respect – it's clear Mike is becoming feminized by Molly's family. In the end, Mike ends up intervening with Joyce and Vince and tyring to help Victoria, fully embracing his new role in the family.