I need help to identify this bike
Your bike is a JC Higgins sold at Sears stores. Not exactly sure of the year but I think most Komet hubs were used in the late 50's into the 60's. Just Google JC Higgins bicycle and I'm sure you'll find a picture of one just like yours. 
Good luck and don't give up on it. When she sees it looking like it did when she was a kid, it will bring back many childhood memories. That is priceless.