Sister Wives Season 2 Episode 5 Wife #3 Hits Sin City ( Air Date 2011-04-10 ) Genre Reality, Drama, Family category. Overview "It's Wife #3's turn with Kody! Christine and her kids head to Vegas so they can spend time some alone time with their dad in her favorite vacation spot. Meanwhile back at home, Meri decides to take the rest of the family out for a bowling night.".