feeling sad about sibling's relationship

[Anonymous]

I think my sibling is headed for separation/divorce. The marriage has been rocky for a long time and things have reached a critical point. I feel really sad about it, on so many different levels. Part of it is that the spouse has been part of our family for years, and the idea that this person would effectively be "gone" seems so crazy. My sibling has seemed pretty unhappy, however. They have a difficult dynamic with a ton of fighting/stress/anxiety but who can really know what goes on in another person's relationship? I worry about their kids and whether separation would be a good thing or a bad thing. Looking ahead to the holidays with this going on is making me feel pretty down.