Very sorry to hear the suffering that you are dealing with :(
If you read Dorian Wright's book ("20 Years Gone: A Divorce Story" that is available on Amazon and Google Books), you will have the opportunity to read about how their spouse did the same, and did similar damage to that family. The only difference is, their spouse waited longer to cause the damage. Sadly, people do things for all kinds of reasons, but that does not mean that you have to sit back and suffer through all of it.
Dorian's book *does* have a happy ending, as they found a new love and were able to move forward with their lives. You can too! We all only get one life- don't let yours stop there.