If I were having a fighter fight against her I would advise a clause that say's she has to make weight. If she fails then she forefits 25% of her purse immediately to her opponent. Fixes the problem easily. (money talks) Nor would I have a fighter fight her without that clause.
There would however be a problem when the management and the promoter are the same people. Rules are far easier to change then and it puts people over a barrel.