They have one set of keys to the apartment.
This afternoon Catherine found herself, without keys, at the door to the apartment and without a way of contacting Cindy, who was, with keys, inside the apartment.
Catherine has a mobile phone with a global SIM in it, and can call me here in Canada for 25 cents a minute.
So she called me. I was having lunch with my friend Kevin at The Noodle House here in Charlottetown.
I Skyped Cindy: “Can you let Catherine in. She is downstairs.”
Cindy, fortunately, was online at the time.
Cindy let Catherine in the door.
Such is life in the digital world.