 Does that mean you never should? Of course not. It depends. So with an adult child, if they're a contributing member of the household, that is, if they are hard workers, if they're respectful of you and your rules, then the fact that it is your house and not theirs. If they, again, contribute in some real and substantive and helpful way to the household, if they're putting in nearly as much work or more than than, you know, than you are.