In Massachusetts, it is legally allowed for a 12 year old girl to marry with parental consent.
This is no longer correct. From Wikipedia:
In Massachusetts, the minimum marriage age is 18, but prior to July 29, 2022 adolescents could be married with judicial consent.[31] Unlike many other states,[32] in Massachusetts an adolescent's marriage did not automatically emancipate the minor, or increase his or her legal rights beyond allowing the minor to consent to certain medical treatments.[7]