Why would a woman hang out with a previous friend/ intimate partner who is toxic?

I been seeing a woman for about two years now she lives in California and I live in Texas. I’m originally from California So I go a couple months over there to visit friends and family. When I do I spend time with her intimatly We have grown close together, talking about our lives and things that have happened in our lives. We have also had The talk about a relationship, but it wouldn’t be fair to us because of our distance, but we Agreed that if we were closer, it would things would be different. now I understand that we’re not together and it makes sense that if She Where to go out or hang out with somebody I really have no authority or say in it, but we do talk almost every day. Here’s where things get a little confusing there’s this guy Who has like two baby mamas and kids with them apparently they had a relationship, not officially, but they were together at one point before me. She had a miscarriage from him, and he was always displaying jealous behavior and almost put her life at risk of an accident because he was being dumb, trying to show off in his car he also would show up to her apartment unannounced and while she was sleeping like literally go in There, these are conversations we had about the whole situation. she stopped talking to him for a while because of all the negativity and how he is and his behavior, but just recently she started again. No, I’ve noticed quite a few things she was sharing her location with me I didn’t ask her, but I noticed she would turn off location services when she’d go with him. And now it’s completely off after a week. She also used to have my messages on read receipts and she turned that off as well, so I reciprocated I never shared my location as we were never official, but I started noticing patterns and behaviors that whenever she does go with him, she doesn’t answer or she turned off the location services now I just find it odd that even though this guy is such a bad person why is she bringing him back in her life

Why would a woman hang out with a previous friend/ intimate partner who is toxic?
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Now it seems like she’s distant and texting less all I got yesterday Fri the 14 march was a hi 👋 baby and a FaceTime call doing her nails at the salon I’m going to start reciprocating with her behavior and taking longer to reply
Why would a woman hang out with a previous friend/ intimate partner who is toxic?
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