Sorry to hear that.
It was excruciating for me to watch my Mom go thru cancer -- early on (in the 1st year), I would stay over at her place (I was an adult at this time) as it comforted her. And this ALSO comforted me, for it made me feel good to alleviate some of her anxiety.

♥ I Loved my mom so (sigh)...

She was my good friend, in addition to being my relation

Good luck to you