When people think of "criminal activity," weddings rarely come to mind.
But in fact there are several California crimes that you can commit by getting married. These include:
Bigamy. You commit Penal Code 281 PC bigamy when you marry someone while you are still married to someone else.
Marrying the husband or wife of another. You commit the crime of Penal Code 284 PC "marrying the husband or wife of another" when you marry someone who is already married to someone else. In other words, this law makes it a crime to be the "other man" or "other woman" in a bigamous marriage.
Incest. Most people think of sexual abuse or pedophilia situations when they hear the term "incest." But in fact California's incest law, Penal Code 285 PC, also makes it a crime for two consenting adults to get married, if they are too closely related to each other.
And the family relationships covered by California's incest law include not only the obvious ones like parent-child and brother-sister--but less obvious ones like half-siblings, uncle-niece, and aunt-nephew as well.