The anger will ease.
I found it has lessened considerably over the last 12 months.
It did require a dedicated effort on my part to let go of it, and to let go of the idea that her choices should have been about anyone but herself. It had nothing to do with me, my brother or sister, or my children. It was about her, and there are somethings mother's cannot do - and we shouldn't expect them to do - for their children. Trust always that she did what was best. Takes some doing though.

Things here are ok at the moment. I have had some self-focused issues to deal with the last few months, so I have found that I have less time to stew, that the faint smell of nostalgia and sentimentality have replaced the harsh stab of trauma and pain. I can talk about her without crying. Most of the time. But there are times, usually when the girls do something great or new, that the pang of her absence really returns.
The last 12 months have really shown me the purpose in her death though, which for me, has been quite a revelation. I see so many accomplishments of my family that we wouldn't have had if not for her death. It was like a catalyst for us in so many ways, and I can see her fingerprints in the current paths of our lives - so clearly. She is here, she guides us everyday and I know how proud she would be - how proud she is - of her children. It gives me strength and faith in my universe. That everything has been exactly as it was supposed to be.