Would tell who she was cheating on you with?

We were engaged and she left 2 months before the wedding. I had an idea there was someone for a few months. Now I know who he is. I don’t think he knew we were together. She kept the engagement ring and suddenly ghosted me.

I hate how I was manipulated and she quickly is moving to get engaged to him. I don’t think it will break them up and she certainly will be pissed but it may give him some pause.