Claire, I agree with Zew on this. Don't go there. I had a lovely conversation with my MIL this afternoon asking what the kids wanted for Christmas. She has waited so late that I'll most likely be the one doing the shopping for her because she can't get it shipped in time. She loves me and she loves her grandchildren. And she loves her son - the one who walked out on his wife. There's no reason to make her choose between us, it's not her fault.