well its your money to do with as you wish,
my logic is
by cutting you off shes made it clear she wants nothing from you and she views you as the 'unclean thing', as her conscience doesnt allow her contact or mix with you it would really not be fair to burden her with your 'unclean' money either.
its only in our contract to love our children unconditionally, its not in our contract to like their behaviour or reward them for said behaviour when it sucks.