My daughter is married to a well paid workaholic who has a different financial background to his wife. My daughter had a private education etc and he a traditional working class upbringing. Reason I mention this is that it has been a pressure on the relationship from the start.
They have two small children 7 and 3. He has a bit of a chip and has a potential anger management issue. Recently I was visiting (which I do regularly) and my grandson had a red mark on his face - he told me on the way to school Dad had slapped him. I don't think this is the first time. He certainly does not hit the little girl, but not sure about my daughter who is trying to be really loyal - although does not seem happy.
What can I do? I don't want to contact social services or approach him at work as this might inflame the problem. What can I do?
Advice and help needed.