I'm sorry to hear about your sister
Probably one of the hardest life experiences is to loose a sibling. I suppose the silver lining if there can be one is the blessing and compassion you bring to people who ask should siblings be tested. I've seen the question asked over and over again on boards. I'm glad you continue to be clear of them. Did you decide to get tested on your own or was it suggested by a doctor?
All the best-
Crwstar