Try this
- Ask the other person about the exact item and caption. Check whether third parties in the image also need consideration.
- Send only the approved version, rather than an album link that exposes additional items.
A worked example
“Would you be comfortable if I send this garden photo to my parents with a simple note about the visit?”
An invented example to adapt, not a real exchange or a script you have to follow.
Before you leave it here
A private message can still be forwarded. Do not promise control over every later copy; choose the material with that practical limit in mind.