Hi rosetta. Agree with decorator, your SIL could probably do with a break and there is absolutely no way I would entertain her son in your home even if he is allowed to travel outside the US which as issi says he probably will be. He has assault, drugs, stealing....the list probably stretches much further on.....dont feel bludgeoned into agreeing to have him. As for your SIL perhaps you could tell her your fears and maybe she will agree that a break alone would be good for her. Good Luck. Vicks xx