Received a warning about the girl I’m dating. What should I do?

The warning was a message from an anonymous number saying:

1. She started dating a guy while she was separated from her ex-husband

2. Her brother is involved in criminal assault

regarding #1, she admit this is true and she regrets it

regarding #2, she says her brother is innocent and was falsely accused

I have strong feelings for this girl but I feel these are big issues and they concern me especially worried about loyalty from first story. How should I go forward?

Received a warning about the girl I’m dating. What should I do?
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