 PLOT: In the supposed stroke of enlightenment where Fletcher  discovers her age and discredits the prenuptial agreement, Fletcher  should also have discredited the marriage in general. The minimum  age for marriage in all states but Mississippi is 18 without  parental consent. It is true that some states (approx 20%)  acknowledge "common law marriage" by which people are considered  married if they live together and pronounce themselves to be  married. There is generally a period of time that this arrangement  must be maintained to be legal. However, California is not one of  those states which allow common law marriage. In addition, common  law marriage is still bound by age restrictions of the state. Since  they began living together before the age of consent, I am not sure  whether it would work, even if California did accept common law  marriage. The states which acknowledge common law marriage are:  District of Columbia, Utah, Texas, South Carolina, Rhode Island,  Montana, Kansas, Iowa, Colorado, Alabama.