Hwo can i ask my gran about her "secret" family history without upsett

Question:

Hwo can i ask my gran about her "secret" family history without upsetting her?

My Gran was married before she met my Granddad and had two daughters. Her 1st husband beat her and she left him, but he got custody of the girls. It hurt my gran too much to see them, so, being who she is, she chose to keep them a secret and hasn't seen them for years (almost 50 years since my dad is 48!). My g aunt Elaine used to keep in touch with them, but died several years ago. I found out about them about the same time, but my gran doesn't know that i know....

Additional Details

1 month ago
My father wants to find them once his mother has passed on, but we know so little, and basically, she won't talk to him or his other sisters about it.

Best Answer - Chosen by Asker: 1 month ago
My father wants to find them once his mother has passed on, but we know so little, and basically, she won't talk to him or his other sisters about it.