How long do girls stay angry after a bad relationship?

Ok so this girl and I spent alot of time together during the last school semester and hooked up a couple times. She was still married, and became very upset when I decided to get back together with my ex-girlfriend. To this day she is still acting immature, talking trash about me behind my back and talking down to... show more Ok so this girl and I spent alot of time together during the last school semester and hooked up a couple times. She was still married, and became very upset when I decided to get back together with my ex-girlfriend. To this day she is still acting immature, talking trash about me behind my back and talking down to me like she's better than me. Is she justified at all to do this?
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