Nothing too horrid being said but it's enough to make my 11 yo DD to be upset and cry over it. She said why does he say bad things about you when you don't say anything about him. I explained that I didn't know why etc. I asked him about it and he admitted it and then has gone on to call our DD a snitch. To which she has become upset about again. We were talking about her being upset and I mentioned yes she got upset about you calling her a snitch. He flew off the handle, made me realise why I left. I hung up on him. How do I deal with this constant bad mouthing?