This would actually be amusing to try because dh hoards his vacation time something fierce and having him experience having to use vacation time to host his guests would surely be interesting.
But I don't know how it would work in real time. I do plan to make myself very scarce when his family comes for their next visit. They always come for at least a week and I plan to be very busy during that time. I've already told dh. And I will be cutting way back on how much I prep for their visits. Clean sheets and towels on the bed and that's it. And I will no longer be lending out my car or being around to make sure there are no issues with the dogs. Guests will be forwarned about this.
Hmmm... maybe I should have them sign a waiver of liability upon arrival.