Once the caller started talking about personal matters couldn't you have told him/her you are on speaker and your caregiver is present and would like to have this phone call confidential? Have him/her give you a sec and then kindly ask your caregiver to give you some privacy while you are on the phone? Or schedule another call at a specific time to discuss this further?

I’m armed and I’m drinking. You don’t want to listen to advice from me, amigo.

-Max Payne