Don’t know what to do!

Patty

So 2 years ago I caught my husband on the whisper app chatting with girls doing erotic role playing, we had had long conversation and I told him my feelings and long story short I forgave him and stayed, things were good for the most part. We had our normal couple fights mostly about money but whatever we were working on our marriage. Well lately I have noticed signs that made me a little suspicious but thought it was due to our financial troubles. Come to find out this morning I grabbed his phone to check something completely different( bank issues) and noticed he was on the whisper app again doing the same shit. He said he only went back to it to escape the stress of us being financially unstable. Ladies all I heard out his mouth was lies and guilt, saying what I want to hear because he got caught. Not buying the bullshit. Anyway I guess my question is any advice on how I should handle this? Me leaving isn’t an option we rent the house my mom owns but my sister in law lives with us too.