steve 1976: You should have physio, it's not too late. Your surgery will make your ankle stiff - a xray will confirm it's not fused, but it shouldn't be.
varun 99: Don't worry so much about her diet, she needs physio for her ankle. Her diet isn't the main concern - eat good healthy food. If she is very overweight then yes loosing weight will help with her rehabilitation. Otherwise however she should be ungoing physio for her ankle, her pain will decrease as she does more exercise and stiffness reduces from the ankle.