Question: does pete campbell find out he has a son

Answer: Yes, Early in Season 2, Peter meets Susie (portrayed by Sarah Wright) after a casting call for Playtex, and they talk in the elevator. Much to Pete's surprise, she lives with her mother, but that doesn't stop them from sleeping together. During the Season 2 finale, when everyone in the office has left for the day, Pete asks Peggy to come sit down with him. Pete tells Peggy he thinks she is ``perfect'', and then confesses that he is in love with her and wishes he had married her. This declaration prompts Peggy to finally admit that she had his baby and gave it up for adoption two years before. After Peggy reveals this, Pete sits in shock. Pete is last seen sitting alone in his dark office, holding a rifle on his lap. It is the same rifle he bought on store credit in Season 1, when he returned a ceramic chip-and-dip he and Trudy received as a wedding gift.