It seems you have to have it explained like to a small child. A school kid gets a call from his teacher at 7:40 pm , that she's meeting with his parents and leaving in half an hour. She will arrive at the meeting at 8:40 pm in one hour.
How much warning time was the kid given of the parents meeting?
30 minutes? or 60 minutes?
Grow up, both of you. what a stupid tête-à-tête. Both of you get a one-hour timeout. Go to your rooms and think about what you did!