Pretty much.
They can do it (if they must), but they should sneak around and PRETEND that they don't. Out of respect for me and the fact that they don't want me to pass out and crack my head open on the cement.
And for as long as I am paying for WHATEVER, my rules are still in force. If they pay for their own room, I can't really say anything except, "Please God don't do this to your poor mother!"
But I wouldn't say it. I'd make a comment about how I hoped they'd be able to get connecting rooms or be on the same floor and then I would stay in another hotel and pretend that they were in seperate rooms.
Luckily everyone in my family understands that I need my denial and would play along!