Oh, I do like your wry, spare prose, which is both poignant and touched with humor. The ache of loss permeates the fic. I like the glimpse we get of Emmeline, so reconciled to death and concerned for the welfare of those she's about to leave behind; and Bumble is a character you could build a whole separate story around. I like his practicality and the capacity of mind suggested by his memorizing the table of contents and index of an entire personal library. I also enjoyed the description of Emmeline's swishy wand with its tiny infinity symbol; it suggests both the resilience and unswerving loyalty of its owner.
The last scene is quite moving (though I smiled at the image of Bumble crossing his toes), and I appreciated the unexpected twist at the end. It's just the sort of thing to shock Aurora out of her paralysing grief: the knowledge that Emmeline would have died anyway and had chosen the means of her departure. It's a bracing kind of betrayal, this revelation of a withheld sentence of death, as well as a reminder that death is inevitable, so why not live.
The last two lines are lovely. If anything will help Aurora, it's this awareness that Emmeline is watching.