Hmm isn't it against code of ethics for a doctor to treat their own family members? I mean, except for emergencies of course, so I guess in the back story for the doctor it has had to be an emergency I guess.
She had an "anime disease" already, had to be separated from the one she loved, and then she had to die by truck-kun?
I mean, yeah it is a plot contrivance, but damn that is brutal