When Becky helps Harris keep a secret from Darlene, it opens up a can of worms that causes a rift between the two sisters. Jackie supports Peter with his Nordic history project, and Dan reunites with an old friend.

When Ben offers Mark free piano lessons, Darlene finds it an opportunity to test his parenting skills. Meanwhile, Jackie throws Becky a baby shower, and Emilio continues his efforts to be part of the baby's life.