If my roommate and I are both at home and someone started to walk in, I'd immediately think it's a burglar. I mean seriously, who just lets themselves in someone's house nowadays? If it's a family member or a close friend, we typically get a quick text that they're stopping over. Or at least a knock! In this OP's case, it's not even family or friends that are barging in unannounced. It's their realtor. From three years ago.