The New Adventures of Old Christine (2006)

S1E9 Ritchie Has Two Mommies

Christine struggles to keep her composure when her ex-husband, Richard, arrives with his "new" Christine to pick up Ritchie for breakfast, intending for them to bond. As the day unfolds, she makes an effort to present herself well at Ritchie's school for parents' night. However, she is taken by surprise when "new" Christine also shows up, throwing her plans into disarray.