I would probably give her foot a rest for awhile and let it continue to heal. Does the top of the foot feel hard or squishy? If you can get a picture of the bottom of the foot that might help us advise you better. It sounds like she is doing as best as can be expected. I’m not sure that I would cut into the foot anymore, but I would be more conservative, and do some daily warm soaks. But I would probably need to see the bottom of the foot pad.