It's called "bigamy" (bi meaning 2 - as in 2 spouses).
You can have as many spouses as you want -male of female*- as long as they don't find out about each other. What I did was have 1 or 2 spouses in each sub-region of Albion.* You can have many female spouses is if they are; bi-sexual or straight. You can have many male spouses if they are; gay or bisexual if you're avatar is male.
Cheating Spouses Caught on Tape 2 - 2001 TV was released on: USA: 2001
Wheel of Fortune - 1983 Military Spouses 2 29-102 was released on: USA: 7 February 2012
Trading Spouses Meet Your New Mommy - 2004 D'Amico-Flisher Perrin Part 2 2-2 was released on: USA: 9 November 2005
Trading Spouses Meet Your New Mommy - 2004 Plonsker Welsh Part 2 2-18 was released on: USA: 17 March 2006
Trading Spouses Meet Your New Mommy - 2004 Dexter Burgess Part 2 2-9 was released on: USA: 13 January 2006
Trading Spouses Meet Your New Mommy - 2004 Clark Crow Part 2 2-12 was released on: USA: 3 February 2006
Bigamy is having two or more spouses at the same time. This is an illegal act.
Trading Spouses Meet Your New Mommy - 2004 Donovan Family 2-3 was released on: USA: 16 November 2005
Trading Spouses Meet Your New Mommy - 2004 Chase Lane Part 2 3-15 was released on: USA: 2 March 2007
Trading Spouses Meet Your New Mommy - 2004 D'Amico-Flisher Perrin Part 1 2-1 was released on: USA: 2 November 2005
Trading Spouses Meet Your New Mommy - 2004 Wopperer Dancy was released on: USA: 7 December 2005