When my mum was having chemo she felt fine straight after the IV drip but went downhill the next few days where she felt nauseus and tired. She went off food a fair bit cause the chemo gave her a metallic taste in her mouth which she couldn't get rid of.
I think maybe some magazines, books, bath oil more pampering things would be better than food/wine but you know her. Mum got a beautiful lavender heat pack and a really soft throw rug when she was sick and she loved them and used them a lot.