there's something very sinister about this scene... i'm speaking as someone outside of japan so maybe it's different but all amane's mom would have to do is say her address and that she needs medical help and the emergency services would understand that something's wrong and come over. she obviously doesn't look well, but if she's well enough to be able to type in the numbers, surely she's well enough to press the dial button? even if she couldn't speak, she could still press dial and THEN give the phone to amane.
but by giving the phone to amane, she's absolving herself of any blame. if amane makes the phone call, then amanemom can push the fall onto her instead. she could even at a later date punish her for it, for failing a test given to her by god. she just didn't expect amane to punish her, which was ultimately her downfall.










