Make her provide for her kids then. What is in the house, stays in the house. I think your kids need continuity, 1 week one, one week off isn't it. You could always have you guys switch places to stay, then none of the kids stuff is moved if you are going to insist that you are fine parenting this way. That way kids keep as normal a life as possible and only the parents are paying the huge price.
kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory