Sign here, little girl

In a vestige of British common law to colonial law, Massachusetts still differentiates between types of contracts it allows married minor women. As in other states, a contract with a minor is not valid or binding. The exception as defined in the following Massachusetts law is for a female minor who marries. Once married, she can become an agent for selling real estate that she and her husband own in common.

Chapter 189: Section 6 Effect of signature of married minor woman
The signature of a married woman who is a minor affixed by her to any instrument relating to the conveyance of land of her husband shall have the same effect as if she were of full age.