Very interesting Ganja thanks for posting.
I identify with a lot of what Sophie writes, my mother too died of metastatic cancer, I too felt a physical wrench - not when she died, but when she told me that her cancer was terminal (which was the first time also that I was told she had cancer). I put the phone down, and doubled over as if I had been punched in the solar plexus, I collapsed, and my young daughter who was there helped me up.
I wasn't with my mother when she drew her last breath, truth be told, like Sophie, I wasn't sure I could bear it, and I bolted. I'm not ashamed of that, I was a young woman and I was terrified. My older sister was with my mother when she died peacefully.