It would depend I think on risk to others. If your T thinks you are at risk and under 18, there may be a duty of care to report. Also if you are over 18 but from the information, your T thinks someone else is at risk from the person they may report.

I had concerns about a family member may be abusing others and my T worked with me to empower me to do something it terms of reporting my concerns.

I also don't think a T would do something behind your back and would discuss it with you.