Oh no, I can't believe I missed this...I've got the perfect idea! Those slipper socks sound like a great gift and those flowers sound even better!
I literally just bought my friend some get well soon biscuits http://www.biscuiteers.com/shop/bisc...-well-biscuits when she was feeling a bit under the weather, it was a bit of light hearted relief.
Your ideas sound just as good though! I hope she gets well soon!