How awful for you both. I have had cancer myself and my husband supported me through treatment and just when we thought we were getting back on our feet; starting to get out and about again he took very ill and died. That was last year. He was diagnosed with a cancer if unknown origin and died within three weeks. It was hard to watch but you somehow find the strength to do it. You have to. Take support from everyone you can and especially hospice support if you can get it. It's invaluable. I will think of you and wish you all the very best.