My husband doesn't know I have a girlfriend. Should I tell him?

Whenever he goes to work I got too her house. My twins live withe her as well because he's a terrible father. I'm at her house right now and trying to find a way to tell him and file for divorce. I'm considering keeping her a secret from him because it's none of his business. So what should I do?
Update: I filed for divorce and told him everything and he got mad because I'm choosing a woman over him
12 answers 12