> Grandma gifts you a photo of her and her partner.
Which is a contrived example that conveniently sidesteps the two most relevant factors: the personal/intimate nature of the communication and the consequences of sharing it against the person’s will during a timeframe in which it would have an effect on the person's life.
Grandma gifts you a photo of her and her partner. Do you believe that you shouldn’t be able to show your own family their ancestors picture?
It’s obviously not reasonable. She could explicitly ask, but ultimately the choice is yours.