Complex sentence: She did catch him cheating, and kept him imprisoned in her basement; however, Charlie escaped and used the royalties from his children's songs to payback all the people he wronged and threatened Evelyn, Alan and Walden.
Split into simpler sentences: She did catch him cheating and kept him imprisoned in her basement. However, Charlie escaped and used the royalties from his children's songs to pay back all the people he wronged and threatened Evelyn, Alan and Walden.