Hi mom-
I know that every chemo agent is different...and each person receiving them reacts differently...
But when my peter was going thru concurrent chemo and radiation...one thing that helped with his insatiable thirst (yet too nauseous to drink anything) was that I got a mini icecube tray...and froze different flavor gatorade mini cubes for him to suck on. It was better than plain ice in that maybe it helped with electrolytes a little.
I got him a journal...although I used it more than he did.
He decided he wanted to shave his head before he was a 'baldy'...so we did that. He looked great! She may appreciate some scarves or hats...
I got some 'manly' smelling lotions...and found that he LOVED a great foot rub (or body rub) alot.
Eating was a huge challenge...things he loved prior to chemo...he had no taste for during...things he 'thought' he had a taste for seemed to make him sick. It was hit or miss.
I also brought some 'cheerful/funny' videos for him to watch during infusions...but mostly he slept.
His first 'chemo' was on valentine's day...so I brought garland to hang from his IV pole...had a bottle of sparkling cider...and plastic champagne glasses etc. Did similar for his chemo on st pat's day (o douls)...and easter time.
We played lots of card games - so maybe a deck of cards?
It is tough...and I send healing thoughts to your SIL.
Best Luck!
michele/cat