What's hard about it? How do they have that much control that they just come and do whatever at YOUR HOUSE? Tell them to let you relax! Where's your husband? Why won't he tell them to leave and come at another time or when they're invited?
I wish it was easy for me to tell them its my MIL & SIL that are always coming & staying & judging & changing things around & i just want to relax π«