Myra Moans and Demi Hawks are working on a seating plan for an upcoming wedding where Myra's stepmom, Silvia Saige, will marry Demi's parent. This means Myra and Demi will soon become stepsisters, but there seems to be some tension between the girls as they try to figure out the seating plan. Siri Dahl has grounded her stepdaughter Kimmy Kimm, which means that Kimmy can't go out to do anything fun - even though her band is supposed to participate in a music competition tonight. Kimmy's bandmates, Penelope Kay and Gia DiBella, come over and tell Kimmy they plan to get Kimmy out of the house. Siri then catches Kimmy talking to Penelope and Gia and sends Kimmy back to her room. Now that Penelope and Gia are alone with Siri, the two girls start their plan. They tell Kimmy to, "Leave Your Stepmom to Us."