Riley's home for the holidays with her new boyfriend, and they don't care who can hear them behind closed doors. Nina's a mom with something to prove to her daughters, so she flexes her hospitality muscle on her daughter's boyfriend's dad. After Ariella advises Nina on boytoys, she needs some playtime of her own. Katie's back in town and takes a trip down memory lane with an old neighbor. Nina's seduced the boyfriend's father, now she needs to go one further: the boyfriend.