Hate to tell you but she’s def being used by some guys, and likely doing stuff with them she ain’t done with you. I had the same scenario a few years ago and after we got back together I checked her phone and surprise surprise she’d be up to all sorts. She even admitted she swallowed a guys cum...
I think you’re spot on, was looking at some texts she sent to other guys earlier and she was saying to one guy how hot it was texting him about sucking his cock while I slept next to her