I Have Cheated On My Wife

My wife cheated on me before we were married and after but the first time she did she got pregnant by the dude and he booted her out of his life on her birthday. I helped raise his child for a time but little did I realize I held a certain resentment. I operated in spite of her for some time and ended up cheating on her 3 different times once it was in front of her on purpose. It wasn't right nonetheless but I did it and It didn't make things better we ended up with no communication we had kids together but that's it. But now I wish I would have reacted differently.