Fiance gabgbangs sooderd entire precinct

I posted here a few weeks ago regarding my fiancee cheating on me. This has been the most difficult time of my life. I feel sad, empty, and betrayed. Yes, I confronted her, she simply shrugged and didn’t have any explanation for what she did or why.

In summary, she fucked the entire precinct in our city. When she refused to offer an explanation, I decided I would contact one of the guys that she had been sleeping with. He turned out a real bro and walked me through the painful story of my cheating ex. She expressed desire to “be their slut” and do whatever they tell her to do. At first, she started off with one guy, then she asked if he could ask his coworkers/buddies to join. They said yeah. According to them, they got together once a week or so to basically have a gangbang. It was painful to hear this because I could never in a million years imagine her in such a way. It disgusts me still. They would also call/text her to meet up at any given time to suck them off or whatever. So she was essentially their sex toy.

I am beyond upset. I moved out and cut her off completely. The guys didn’t know she was even in a relationship let alone engaged. I tried to understand why she did that, what was lacking. She only said that she felt good being treated like a whore by them, being restrained and slapped. Yes, it was all consensual. I have not told anyone about this, I am too embarrassed. I haven’t even gotten out of the house besides work. I’m afraid people will soon start asking why we broke it off. What am I supposed to say?! I’m so broken and confused.

TL;DR: trying to navigate around my fiancee’s betrayal and the aftermath.