ANSWER:

It’s not permissible to put a condition like this.

You can give her the zakat and it’s her choice if she wants to return your money with that zakat money. 

A Muslim had given a loan of Rs.5000 to his Muslim Miskeen maid. She is not able to return the loan. Can he help her by giving Rs. 7000/- from the Zakat Money and ask her to return the loan of Rs.5000/- Can this, Give & Take transaction take place simultaneously.