Hello and welcome.
I read your post before you editted it. I am responding to what I remember reading.
You and your sister may never reconcile, and that won't be your fault. She doesn't seem to be in a place where healing begins. Keeping open the possibility is hard on you, I know.
I see no reason not to use the money as you see fit.
Please post again, this is a loving community.
Art by CarrieFlanders
Assistance for Alcohol and Substance Abuse issues