Complex sentence: Cora begins behaving strangely and angrily tells Tanya the truth about Rainie, while telling Patrick that Ava is alive; she was forced to give her up for adoption.
Split into simpler sentences: Cora begins behaving strangely and angrily tells Tanya the truth about Rainie. When Patrick questions her on her behaviour, she reveals that her daughter, Ava is in fact alive and she was forced to give her up for adoption.