Okay, WHO Told?

Hubby comes home tonight and tells me he's been talking to his brother. This in itself is not usually a good thing. Okay, I'm bad. I don't care - he and I have history and it's gonna come to a head one of these days. Another time, another story.

It seems MIL has been talking to BIL. MIL has been making pronouncements of how SHE is going camping this weekend to the races in the RV. WTF??? How did SHE find out? How did this happen? How can we stop it?

I have the sickening feeling we can't.

Would anyone like to offer to take my MIL to some alternate location this weekend? I'm open to suggestions...