Lily confronts Tim after he allows Sara to bring a dog inside despite knowing Lily's severe allergy, sparking a heated argument about carelessness and safety during her pregnancy. Tim insists he has already sent the dog away, but tensions escalate as Lily demands he respect her condition. Meanwhile, Sara learns of a plan by another woman to provoke a divorce with Tim and claim him as her true love, aiming to invalidate Lily and Tim's four-year marriage. The episode ends with Lily overhearing the scheme and confronting the instigator, refusing to back down.