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.
OK. I do, it is, she's a sweet person & is a gentle, concerned, occasional line of communication, never would put her in awful middle (a lose/lose sitch, for sure). Y'know, stilly, I do believe that in my heart of hearts (the furthest thing from the truth comment). haven't dared say it to anyone except, now, you (and a couple hundred DBers). I always keep her turmoil in mind Doin' the best I can, still in the stage of this sitch occupying my thoughts every waking minute of the day (aaargghhh!!)
Thanks.
Gardener
"My soul, be satisfied with flowers, With fruit, with weeds even; but gather them In the one garden you may call your own." Cyrano deBergerac