Just like how ancient games and screen savers had a “Boss Mode” shortcut that showed a fake screenshot of Excel or whatever, all modern devices should have an “Allow limited or fake access to someone else to avoid the socially awkward situation of saying No” option.

Call it Duress/Panic/Boss/Jealous Boy//Girlfriend/Puritan Family Mode or whatever.

iOS has something called Guided Access which sorta helps a little bit but is very obvious to the other party.