I understand why you are asking the question.
This is a different scenario, but I was reminder of this upon reading your post. A relative was overseas years ago and renting a room from a couple with a child. There are times when the husband would beat up his wife. My relative saw or heard the incidents, and there is another renter in the apartment, a young woman studying at the nearby university.
I was thinking that if I was in their situation, I don’t know if I could last, knowing and hearing that the wife is subject to domestic violence, with a young child, and there was a time when she was even pregnant with their 2nd one. Maybe I would have tried to look for another place I could rent, because it would be hard stand knowing that someone is abused right then and there and I couldn’t or didn’t do anything.