So sorry, may she rest in peace. Try to surround yourself with friends and family, while allowing yourself to remember and grieve. Sounds like it has been a long road for sure. God bless her for making a tough decision that minimized her suffering as much as possible while sparing you/family/friends from furthering suffering. Sounds like an amazing human being for sure. God bless you for being a great husband/partner/care giver.
I remember when Mom made her final decision to stop the transfusions that were keeping her alive. We were so blessed to spend one final week with her around the holidays before she passed.