I think you just have to let your mom be. Maybe by staying on your trip, and being calm, she will realize that going loony-toons isn't going to help.
Hmmmm, here's a thought, that might be impossible to do...
You wanted some time alone, what if you asked your mom to come to where you are and watch the kids for a couple days, and you could spend some time alone, at least during the day. Maybe getting your mom away from the drama at home would calm her down.
If it's a crazy idea, remember, I am a man, and I try to fix things!
