Then leave her alone for now. Talk to your coach, see what advice you get. When you do see her be upbeat and concerned for her but not overwhelming. And I think if you trust DIL that's good. Keep line of communication open but don't abuse it, don't put her in the middle of things. And even though she said she wants a divorce, I believe that could be the thing furthest from the truth. Keep in mind she's hurting too and in a lot of turmoil. Take care of you and the rest will work out.