Bigamy

[Sarah]

The offense of marrying one person when already legally marriedto another. Wharton.

[Sarah]

/noun/ -- The practice of fruadulently marrying more than one spouse

[Sarah]

Bigamy is defined as having one wife too many.

See [monogamy].

[Sarah]

The instance of having TWO wives.

the clue is in the Prefix 'Bi' - meaning two.
Having multiple wives is known as '[Polygamy]' - not Bigamy

[Sarah]

A kind of awkward word for your last name to derive from if you're a girl.

[Hina Muqadas]

the crime of marrying a person while already legally married to someone else:

[Kai]

The act of going through a marriage ceremony while already married to another person.