u/HotMirror2067

AITA
I (35) and my wife (37) have been together for more than 10 years and married for most of this time.
Last year out of the blue she had a strange reaction to her ex boyfriend.
We are sexually active and I am not a jealous guy, while she is a bit.
When I first met her she was out from this toxic relationship with this guy that went on and off for roughly three years. She was quite affected by it, as he was treating her horribly and when she decided to cut it, he started stalking her for a bit. At the beginning of our relationship she was afraid he could pop up anytime and was quite worried.
Fast forward to last year when she found out from a common friend that this guy was sorry for his behaviour. She started spending days day dreaming about it. How things were in the past, if it could have been different.
After a week of this behaviour I was quite worried and confronting her she told me it was something that has been closed badly and that it made her feel she needed a proper closure, and apologies from him.
When we visited her hometown she eventually met him one night while she was having a drink with her friends and I was visiting mines.
She told me they chatted a bit and he was nice but kept on asking about us and how our wedding day was the worst of his life.
She told me all this but that as for her the apologies were sincere and there was nothing more.
She told me she would have probably not seen him again, but (and I know I was wrong) I saw she told ChatGPT she felt like they were just the two of them talking and that she would have seen him again.
After two days I was away again for dinner. She was out with her friends and this guy as well.
She later told me that in the bar he kept on telling her in front of everyone that if she was not married he would have pressed her on a wall and fucked her and he kept on taking her by the neck as he used to do when they were together. She told me she kept on refusing him. And then she left to get home and reached the friend later.
Meanwhile I got home, and she told me that on the phone while I was driving and she was getting back out to meet her friend.
I knew he would have been there and I told her I would have needed a drink and to tell me where they were going to be so I would have not got into them.
I went out drank two vodkas and they came around a street close by. I was upset cause it did not look fine the whole thing, but I stayed where I was cause I did not want to make a scene.
She noticed me anyway and left them for a second, she was upset I was there as if I was controlling her (absolutely not what I was doing) then basically forced me to feel guilty and I told her to go reach her friend and have fun without worrying about me.
She reached them and kept on spending another 3 hrs with them.
I meanwhile went home and slept an hour then since she messaged me saying she was coming home, I get downstairs and start walking in her direction just to have a walk. I told her of course but she did not reply immediately.
She came home with the bicycle and then called me infuriated asking me where I was (literally a minute from home) and what I was doing.
I did not understand why she was upset, I went home and she told me that they just had a few drinks all together and then walked home.
Then she added that actually she and her ex left their friend and walk just the two of them and spent a good bit of time talking under his place and that he kissed her.
I was upset but I tried to underplay it. She was annoyed by him and the situation and she never seen him again.
But. I can keep on taking away a few details from my head: she had her knees dirty of ground (she told me she fell from the bike (but they were not hurting her). And I do not understand why she was so mad that I was not at home but outside and that she kept on asking me where I was.
Am I just overthinking everything or did she betray me?