Hmm, know what that's like....
Nice that you want to go further than a card.
Chemo going in can make the person a bit cold. Pretty throws are nice. (Course, some chemo places warm blankets and give them to her upon request.)
If surgery is involved, my favorite present was fuzzy slippers you could slip into, and a pretty throw to put on the hospital bed to give it color (instead of staring at hospital white). I could throw it around my shoulders for a walk because those gowns are revealing.
One of my distant friends was a reader so I got a bookmark with "Believe in the Cure" on it.
A paid appointment with a cancer nutritionist or oncology nurse will help her side step many side effects of chemo.
Some wigs are free through the Cancer Center but... limited in choices.
The lowest quality of wigs are scratchy and you can't use a part.
The $400 wigs are better by letting you part your hair and are softer on your soft head. Most or all chemo patients for breast cancer lose their hair. Or, perhaps there is a website that shows how some bald women can look fabulous being bald with big earrings, great makeup, learn how to create eyebrows and eyelashes through liner, a fake tan (from tanning place or daily creams), etc. I've heard that people with wigs kind of end up not wanting to wear them all the time and certainly not to bed.
That's not you, but you could offer to do research for her online (local wig places, nutritionists, informational sites, yoga to de-stress) or web social sites for breast cancer patients. A book on surviving chemo that is motivating because of all the positive stories.
Like the one about a paid housecleaning.
There is a book called _________ that helps show them foods that may not cause nausea. (Hopefully she has a partner to do groceries and cook or bring in food because it's not easy being the cook when those strong smells arise.)
Chemo gives you chemo brain. You forget things, you can't stay on a project long, etc. So, staying organized and getting the basic responsibilities done are HARD. You can't do that for her but perhaps your friend could help her set up autopay for her bills, a file system for medical papers that will pile in, etc. (Yes, one big wish is for a secretary to handle most everything. I had mail stacked up for months and the ones that weren't on auto pay, oopsie. Having Outlook on computer set up to remind them of imiportant appointments or get togethers.