They are fortunate you are not a pistol toting hair trigger weapons owner.
Most places when strangers have entered your home and you have no idea who they are one automatically reaches for their home defense weapon of choice first.
Yeah, you need to have a talk with your realtor....
Really. Something along the lines of "if you don;t have personal confirmation from myself or my wife to bring prospective buyers over to see the house, you nor anyone else may enter my home.
Until it is sold, it IS still your home.... And your home is your safe place......
WoW!!!!! Iffen that was my jhouse those folks would have been staring down the barrel of a 12 gauge pump shotgun when I would say good morning, how do you like your lead pellets???
What a way to start your day!