On my family road trips my daughter spends a couple hours on my lap at the start of every extended driving period so that my son can have some private time in the back with his DVD player. I think my sister and I both wish our parents had been that considerate. It was always a little awkward when she absentmindedly looked over.
I once hid a burned porno labeling the disc “8 Legged Freaks” cuz my girlfriend is terrified of spiders! Never even thought my little brother would want to watch that movie! At least it wasn’t my whole family though.