No idea what to do, can someone help me?

So a bit of background first, so I broke up with my ex about a year ago, she was abusive and a cheater and around bad person so I left her, then around the 4th July she texted me after about 8 months of no communications saying she changed and stuff and she wanted to be friends and make up all the bad stuff she did to me. I went along with that for a month before I realized she was the same messed up person who hurt me before and told her goodbye again. She called me back today, (she got a new number so I answered not knowing it was her) and she was crying and trying to tell me something. It sounded like her uncle was either hurting or molesting her sister or was going to or something, I'm not sure she was crying too much to understand, but then she just said she had to go and hung up. No idea what's going on with her and not sure if I should just block her number or call her back or what... Any help or advice would be great...
No idea what to do, can someone help me?
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