Your mum finished her work on earth and left the stage in a manner that leaves those of us left behind with a cry or agony in our hearts, as the fragile thread of our faith is dealt with so sadly. Is anyone strong enough to stay conscious through such teaching as you are receiving? Probably very few. And even they would only have a whisper of equanimity and peace amidst the screaming trumpets of their age, grief, horror, and desolation.
I can't assuage your pain with any words, nor should I, for your sadness is mum's legacy to you. Not that she or I would inflict such sadness by choice, but there it is. And it must burn it's purifying way to completion. For something in you dies when you hear the unbearable, and it is only in that dark night of the soul that you are prepared to see as "God" sees, and to love as "God" loves.
Now is the time to let your grief find expression-no false strength. Now is the time to sit quietly and speak to your mum, thank her for being with you these few years, and encourage her to go on with whatever her work is, knowing that you will grow in compassion and wisdom from her experience. In my heart I know that you and her will meet again and again and recognize the many ways in which you have known each other.
And when you meet you will know, in a flash, what now it is not given to you to know: why this had to be the way it was.
Our rational minds can never understand what has happened, but our hearts-if we keep them open to "God" -will find their own intuitive way. Your mum was in your life to do her work on Earth, which include her manner of death. Now her soul is free, and the love that you can share with her is invulnerable to the winds of changing time and space.
In that deep love, please include us.
RIP