Advice?

So my husband has been talking to other women. He's done this before, always lies about it til I actually catch him outright. We have three kids and I'm 10w with another. Not planned. I am a Christian and that does influence my feelings here, not asking for help with that. I know everyone will say leave him he's a loser. Yes, I know he's a loser, but I don't want to leave him. I want my children to have both parents in the home and I believe that marriage is for life. I'm not that heartbroken this time, he's done it enough times before that I kind of expected it I guess. Anyway, I don't even know what I'm asking for here. Not validation cuz I know 99% of you are gonna think I'm crazy. 😂 I think I would like to get some kind of revenge. (Yeah I know that doesn't line up with being a Christian, I'm not perfect ppl). I'd like to just make him feel as letdown and stupid as I feel, or kick him in the balls or something. Any ideas??