(VIDEO-AT-LINK)BILLINGS - Given the U.S. Supreme Court's recent ruling that same-sex marriage is legal in all 50 states, a Lockwood family is now looking to solidify rights of its own. We first told you about the Colliers in January of 2015 when the polygamist family appeared on an episode of the TLC show, "Sister Wives."The polyamorous movement is a national push to allow marriage between multiple partners. Nathan Collier and his two wives, Vicki and Christine, said Tuesday that they are simply looking for equality. Nathan is legally married to Vicki, but also wants to legally wed Christine. On Tuesday,...