I checked my girlfriend's phone and confirmed my suspicions

My girlfriend started working at a factory a few months ago, and out of nowhere, she was getting promotions—business trips, “training sessions.” At first, I was proud of her, but honestly, something felt off… She’d come home tired, but not a normal tired. More like… drained.

One day, I couldn’t take it anymore. I opened her WhatsApp while she was sleeping. I found a conversation with her best friend that fucking destroyed me. She was telling her everything, like it was no big deal.

Turns out, this supervisor put the idea in her head that she had “leadership potential,” but to see where she fit best, she had to “be available for everything.” Obviously, he wasn’t talking about work. She said no at first, until one of those assholes convinced her that anal didn’t count as cheating. And the worst part is, she fell for it because we had never done it in all our years together. So there I was, treating her like the innocent girl I thought she was, and some other dude took advantage of that.

After that, it became a routine: business trips where they’d fuck her, department changes just so another guy could have a turn. She even told her friend that sometimes she’d come home “full” and still come to see me, and I, clueless, would be all over her. Basically, more than once, I was the second guy without even knowing it.

The part that fucked me up the most was reading about this one time when, because I was being stubborn, I got really intense with her and ended up going down on her more than usual. She said she almost died of embarrassment because I was tasting things that weren’t mine. And there I was, all happy, eating her ass.

I don’t know what to do with this. I’m torn between telling her to go to hell, feeling sorry for her because she was clearly manipulated with promises of promotions, or just staying quiet because, honestly, I can’t even find the words. I just have this mix of rage, disgust, and shame that won’t let me sleep.