No, she can’t. as long as the contract is done without conditions, they can’t add things to it unless the husband agrees.

Sheikh,I heard that a girl can keep a condition in the nikkah contract that she can ask for divorce,What if she didnt use it then,can she ask for the same condition after the contract is done.

Marriage Contract | February 18, 2014 6:18 am
Previous

If a muslim marries a non-muslim, not ahle kitaab but hindu. Will his marriage count? And everytime he has sex with her even after an official marriage contract it will be considered doing zina with that non-muslim woman.
Next

I want to ask you about the marriage without a legal form, I mean when the wali of the woman and two witnesses and also the admition of her are completed and present but without writing the act of marriage. Is this marriage acceptable?