Geez, I think mom needs to get a second opinion. That does not sound right..
Some kids absolutely are toe walkers but don't have issues actually straightening out their feet...that seems like some sort of muscular issue.
I would really suggest to mom to get a second opinion.
Either that or buy these kinds of shoes....
My DH wears them and they literally fit like second skin. they are soft and flexible so they would mold to the child's foot.