As long as your mom can be cordial then I think them being together is okay. I spent some time with my MIL during the divorce. We just stayed away from talking about it and tried to be positive around the kids. I think it was a good thing because it was a reminder to my husband how far family extends. I've always been pretty close with her. If your mom doesn't feel comfortable then she shouldn't have to be around her. Also, if your mother is one to share confidential information then it might be wise not to have them together. I think it all depends on your mom and how she handles things.
Last night I happened to catch the movie... gosh I can't think of the name of it, Reese Witherspoon... something Alabama... where she wants to divorce her husband so she can marry someone else, and he's putting it off... even though it's a movie there's some things in it that seem a little DBish. Kind of a cute movie.
There is no arriving, ever. It is all a continual becoming.
