My exhusband started with the paranoid accusations, in hindsight, right around the time a certain individual entered the picture.

Recently, I was asked if perhaps I think he had been cheating on me, by a coworker who by virtue of the community that I work in, knew some of the background details of my own history, the kids, the divorce, the domestic assault, etc., etc. She asked as we were discussing odd behaviors and meanness when a spouse cheats.

Something to consider, as it becomes confusing to try to prove trust worthiness.