Complex sentence: Alma tells him she thinks they still have a chance to be happy together and proceeds to blackmail him over running over Mike Delfino in his car and burying Monique Polier.
Split into simpler sentences: Alma tells him she thinks they still have a chance to be happy together. She proceeds to blackmail him, threatening to reveal that it was he who ran over Mike Delfino in his car and buried Monique Polier.