Wizards of Waverly Place (2007)

Season 3: Episode 19

Harper and Alex find out that Max has a girlfriend named Nancy Lueke, but has been keeping it a secret so not to get embarrassed by his family. Later his mother finds out about it and tells him that it's not okay to hide the truth from anyone. Since he took his mothers advice, he tells Nancy his secret about being a wizard. The Russos make up another lie to cover the truth, and Nancy breaks up with him.