My youngest daughter has boomeranged back to us for a third time. Previous to that my son boomeranged back once as did our eldest daughter. We are happy to help them out in these circumstances, have never charged for room and board. They have always contributed in one fashion or other including paying for groceries and doing chores, etc. I can't see making them pay rent. If they could afford rent they would certainly be living on their own. In fact, they don't want to live with us, its their circumstances that are forcing it. Family is family and we will always be willing to do what we can to help each and everyone one of them. How in gods name could I live with myself if I became some sort of landlord to them? That's just not the way we raised our kids.