I am one of my mother’s few caregivers, along with an aide, but I am also her health proxy, basically the “go-to” person for all matters. My husband & I have kept my daughter in the know with Mimi’s condition and she sees her often but I want to prepare my daughter without stressing her out. God knows, teen girls have enough going on normally! So far so good, I think; trying to keep a balance.
You may find that your daughter is already better informed and ahead of the game compared to her peer group, and all credit to you; but I hope there'll be some useful ideas there.