Actually did sleep with her. Twice I believe. Though I did know her for a while.
I think the train of thought at the time fell somewhere in the middle of 'intentionally-relationship-wrecking' a shitty pairing, 'Any-Port-In-A-storm', and 'Shmeh-Why-Not'. It's not like I'd actually seen her naked prior to the first time. And a lot of our back and forth was banter, and me pointing out things she needed to curb, in respect to her communications with other people. (Such a lost cause).
If you're curious about what sort of terrible habits she had in the bedroom? I never really noticed all that much- though I've never really had much interest in the degradation aspect. And..anything involving water sports or scat tends to just be like 'Nope.' So, it wasn't actually a thing that ever happened with me and her.
That said, I could entirely see her getting into that with Mike- but that's more or less because he seems more than happy to erode away at someone.
Emotional cheating wise, she did seem to get attached to me- even when I outright said that I could not see a relationship forming between us. She'd offhandedly say things like, "I could see myself falling in love with you, especially if things with me and Mike don't work out." Which was sort of a red flag considering the like ...Yandere aspects that'd spike up here and there. It's also part of why I was just like 'Not sleeping with you, or doing anything beyond this', after a point, and just sort of went to a strictly care-taking point.
She actually -regressed- as a person in some regards, as she remained with Mike. Like, super unhealthy co-dependency bit.
P.S. The hilarious thing, is she's not even anywhere close to the angriest or most volatile person I know, which is probably why I was so ambivalent towards certain aspects of her personality which should seem more outrageous. She was like... ..maybe a 7? Or lower.