Wow, I do feel for you. Both hands would be killer. Fortunately (?) for me I still only have the serious contracture in the one hand and not my dominant one either, so most day to day stuff is fine. Gloves are annoying though
. I've heard conflicting information about the genetic inheritance of the condition, and like you none of my six siblings exhibit any signs at all and they're all senior to me. One thing I always remember from early on in the early stages was my doctor saying to be careful about alcohol intake. He said a beer or two no big deal, but try to keep it at that. Don't know if there is any merit to that at all but I've quite alcohol altogether for about 10 years now anyway so no longer a concern.
Hope your hands don't get any worse.
-frank