Your BIL is a trifling fool! There is no way her wheelchair made scratches on their floor unless she's got a nail in her tire.
) BIL is on edge the entire time Christian is in their house. Which is why we very seldom go to their house.
It's hard enough being the mother of a disabled child without morons pulling stuff like that. I believe I'd have to decline Christmas. It doesn't sound like you'll be missing much.
People are funny about their woods floors. Heck, I'm funny about my wood floors.
Funny? these people are stupid, mean-spirited and cruel. Do they also ignore the little girl because of their wood floors?

I'm mad reading this! What a crummy thing to do! I doubt I'd want to spend my holidays with people who didn't acknowledge my child, let alone blamed her for any kind of damage to their home.
People are funny about their woods floors. Heck, I'm funny about my wood floors.
I don't get this
I have wood floors and would never think twice when I have guests over what might happen to them. If you do then you shouldn't have them. That is as bad as when my dear old granny put plastic slip covers on her furniture
The real issue is their reaction to your daughter. I don't know who's side the BIL and SIL are on but whoever is the sibling needs to have a heart to heart talk with them and find out what the problem is before I would subject my child to anymore hurtful ignorance 

