Stephanie is excited about celebrating her first Mother's Day until she learns that the family plans to celebrate her on Stepmother's Day instead; Stephanie takes her mother to a day spa and gets some unexpected "mom" advice from a few experts who attempt to cheer her up.

Stephanie organizes a charity auction to inspire the children to give back; Stephanie goes to extreme measures to beat the previous fund-raising record.

Stephanie's old pal visits when Charlie's on a business trip, and Stephanie struggles to deal with the kids while living up to her old party-gal reputation.