I had one that I broke up with when I found out she was more on the psycho end (Daddy issues, excessive lier).
So we date for about 5 months, super physical more than anything and after I break it off, she came crawling back a few times and I still banged it out and we ended up in this weird not-together/fvck buddy situation (awful idea, I know).
So, she oddly invites me to her family Thanksgiving along with her best friend and her boyfriend who I went to the gym with all the time. She ends up oddly flirting with the guy in front of her family and I'm stuck there talking to her bf, mom and aunt most of the time. She goes on a beer run with him to get more drinks and me and her friend finally start to talk about how weird they've been. I call her the day after Thanksgiving and tell her we can't hang out/bang anymore...completely done. The holiday was the strangest thing I've ever experienced.
Next time I'm at the gym with this guy, he tells me how my ex is giving very weird vibes and she's kind of ruining his 5-yr relationship with her bf. He tells me she was actually trying to interrogate him on the beer run about what we talk about at the gym. I tell him I'm not with her and its a problem between the 3 of them. I then hear over the course of the next month how she's constantly asking about how I'm doing, blah blah...long story short--I'm celebrating on my bday with mutual friends where she shows up. Runs up $150 on my bar tab without me knowing and takes my jacket from coat check that I for some reason had my phone in. She gets even more loaded than me and peaces out.
The next day, I can't find my phone of course (Missed all my family bday calls and also got a job offer) and get a FB message saying she has it and to get it from my gym buddy's place. I pick it up to find her, her bf, and this guy all in bed. It was like 3PM. She was trying to stage things to look like she had a threesome with them to make me jealous. The dude confirmed this. So I pick up my stuff and before I leave say: "Well it's been interesting knowing you guys, have fun with all of this I guess". Never talked to her again.
It's something I can laugh about right now because of how pathetic she was. Nut job.