Difficult conversation

Mum asked one of her doctors yesterday if she was going to die. He told her if they couldn't sort out her breathing then yes.
She's been visited by the palliative care nurse who asked her if there was anything she hadn't done that she wanted to. The only thing she could think of was organising her Thanksgiving Service ie her funeral service.
I can't even begin to imagine what it must be like to have such a conversation. To be faced with your own mortality so starkly it messes with my mind.