Dear Sir,
A hiba, or gift, is an intervivos transfer of ownership in a property. The term "intervivos" refers to a living person. A gift is a property transfer in which ownership is transferred from one live person to another without regard for existing property. Hiba is the name given to a gift given by Muslim laws. Gift is covered by the Transfer of Property Act of 1882 (sections 122 to 129 of the Act), whilst Hiba is controlled by Islamic personal law. On Hiba, the Transfer of Property Act of 1882 does not apply. Gift is one of the matters governed by muslim personal law, according to the Shariat Act of 1937. If one of the parties is a Muslim.
As it is clearly mentioned that a hiba can be considered only between two living people therefore this particular transaction cannot be completed, so instead of a gift she can actually relenquish the amount of mehr or part of the total amount as she wishes.
Regards,
Aryan Raj