I second audiobooks - I loved those. Don't know if she if she if having a line put in or canula in her arm each time - if the latter then knitting or anything is not really possible, but if hands free she could do something like that.
I always took a little lunchbox of nibbles- hospitla will provide sandwiches etc, but your sense of taste changes on chemo and she may find she likes particular things - I had nuts, dried fruit, cherry toms, and olives.
Alsosomething nice to drink afterwards when she comes home - you have to drink to flush it through so a favourite juice or squash can be nice, I drank lucozade which made me feel abit less nauseous too.
I found sorbet was nice andfresh tasting too, so perhaps you could popatubin her freezer.
A cardi to wrap round shoulders - it can be fairly cold, butyou want to be able to take it off if necessary.
Hand warmers, wrist warmers, warm gloves to keepher hands nice andwarm so its easier to find a vein.
Lots of luck to your MIL with her treatment, the first chemo is always a bit scary because its aleap intothe unknown. Once she has acoupleunder her belt she will feel she's in a routine and have an idea of how she is going to feel at different parts ofher cycle.
Also make sure she has a thermometer to take her temp if she feels at all under the weather, - chemo unit will tell her all about it, but if she gets a temp she needs to ring the unit/cancer ward and she might have to go in for a few days, because of infection risk.