<human>: This girl that I've been talking to for a few weeks now just started talking and hanging out with her ex boyfriend that cheated on her a few weeks ago. 

This girl and I have been texting and we really hit it off. We have hung out only once though. We aren't dating but we both seem like each other 

Today I found out from a friend that she has been talking to and hanging out with her ex boyfriend. She has never mentioned him after she broke up with him. 

Before she broke up with him she would always talk about how bad of a boyfriend he was and would always talk bad about him. She even said that he has threatened to punch her if she left him. 

My question is should I bring this issue up with her or not even bring it up at all. I feel like she has been a lot more distant in the past couple of days and I think it has to do with her talking to her EX.

Can you give me the gist of the text in a nutshell?
<bot>: The girl that I've been talking to has become more distant with me and has started talking to her douche bag ex boyfriend without mentioning it to me.