So it's DS's 3rd birthday and we have a day trip planned as a present, both sides of grandparents coming along too. MIL coincidentally gave us a brand new single quilt that she no longer needs last week and has just messaged DP asking if she can stay over on the couch the night before DS's birthday to turn a 3.5 hour road trip into a 1.5 hour road trip. Not premeditated at all 
AIBU not to want MIL staying over the night before his birthday as I just want us to celebrate his birthday on our own for an hour before we meet up with everyone else at the event?
This woman let me live in her house free of charge for 6 months whilst I was pregnant, so I feel bad refusing. But tbh I couldn't think of anything worse than have her try & take over my home the way she does everything else! And if I allow it once she will expect it again. And again. Which I don't want...ever!