I’m currently going through chemo treatment. I’ve been very lucky so far since I had very mild side effects and my chemo protocol is very intense. In my opinion, the best thing you can do is be available for visits whenever she has the energy for it. My godmother also went through a harsh treatment and multiple surgeries, and she said she felt constantly lonely, and even though I’m a very “home” person, I also miss seeing some friends a bit more than usual.
If you want to ask anything feel free to, I don’t mind talking about it.
I know it might seem weird but older monster Hunter games works for me