Saw my ex in the club yesterday. We talked a few times very briefly… she was being jokingly strange. Thoughts on why?

New2this2
Just to elaborate… She’d come with a few friends and walked by me in the club as if not noticing me. Then I poked her to say hi, and gave her a hug and she’s sarcastically said I didn’t give you permission to hug me. Told her jokingly back, my bad. After a brief chat I went and did my thing with my friends. She came back over to say hi at one point and started speaking gibberish and I was just going along with it cuz she clearly had a few drinks in her. Then my friends and her friends left the club at the end together and she started talking to another mutual friend who Id seen the week prior and she said she’s seen at the same place even though I didn’t see her there last time. (For reference this friend is a guy who went viral in one of her TickTocks months ago) Then she began referring to snapchats she sent him, and he’s like you didn’t post that in your story as if it was risqué and I was just standing there… so I left to hang with my friends to make it clear I didn’t wanna hear it. Then she said bye, I gave her a hug told her I was going to a bar and asked if she wanted to join. She said no, then proceeded to tell me she was sexually assaulted. Me being worried, said that’s scary are you OK, do you wanna talk about it? She’s like no, she’s like just wanted to let you know this is what happens to woman. Told her I was sorry it happened, and if she wanted to tell me my ears are open. Then I went to the bar she just said was gross.. and 10 min later she followed in, used the bathroom, said goodbye again, told her sarcastically “I thought this was gross” she waved goodbye and sarcastically gave me the finger.
Saw my ex in the club yesterday. We talked a few times very briefly… she was being jokingly strange. Thoughts on why?
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