Quoting Sarah Bare-ah♡:" Are you separated or broken up? You really don't need to hide anything. As long as the person you're seeing isn't a criminal there is nothing he can use against you in court."
Quoting Vile Tramp:" The only thing I would be cautious about is him saying you were having an affair with the guy prior. ... [snip!] ... her for adultery. ( Which is a crime in NYS). He lost, because he had no proof that this was going on within the marriage. "