Prison rules. First thing you do is punch the lights out of both. Make it clear your top dog. If they resist, keep punching. Its your block, not theirs.
Truthfully theres going to be a point where you need to just live your normal life and stop hosting. My wife's parents come by every few weeks for a day since they live so close. When its something my wife planned and I didn't know about it. I just do my normal stuff, I'm not hosting. Works fine.