Complex sentence: She tells Zak about her past and makes him promise to keep quiet and pays Jared but when threatened by Zak, he reveals that Amy's affair with his father caused his family to break down.
Split into simpler sentences: She tells Zak about her past and makes him promise to keep quiet. She pays Jared but when threatened by Zak, he reveals that Amy's affair with his father caused his family to break down.