My child half admitted to me that her father and his gf hit each other. She refused to give any details at all.
I told my therapist. My therapist said, "you know that would be child abuse???"
I explained that I know this, but I don't know for sure whether it is happening. I also explained that I have encouraged my child to tell the school or my child's therapist if they are scared of dad or if grown ups are hurting each other or anyone else.
YABU - No, obviously this is total hearsay with no specific details and it would be mad to report
YANBU - Yes. Your therapist has probably already reported.
(*In case this sounds familiar - the general topic of the abuse is also covered in another thread)