No. Just...no. I'm so sorry. That sucks. As you know, my sister is in a terrible marriage. My way of supporting her is just to listen and sympathize. I think he's a piece of &$@?!, but I don't have to say that. I just stick to repeating "Yes, I can understand why you feel that way..." and other versions of that.
One thing that may help in getting the family member through this is for you to express to them that they will always be part of your (extended) family. People want to belong. Losing your spouse immediately means a lack of belonging. By affirming for the family member that you consider them to be part of your family, you can provide them with comfort ans not feeling so alone and disconnected.
Mommy to my One & Only 05.07