Do you have any household rules if your grown children still live at home?
I am thinking situations like if they said they were going to be home and they decided to stay at a friend's or boy/girlfriends for the night would they let you know?
Similarly if they said they were going to be home at 4pm would they let you know if they were not or just turn up hours later?
If they said they were coming home on the last bus home and then didn't would they let you know?
I'm navigating this with a disabled adult offspring which muddies the waters slightly but I want to work out how unreasonable I am being.