Dancing With the Stars has added family members of two of its most iconic competitors to the season 35 cast. Us has learned that Secret Lives of Mormon Wives star Whitney Leavitt’s husband, Conner Leavitt, and model Brooks Nader’s sister Sarah Jane Nader both will join the dancing competition this fall. Us has reached out to ABC for comment. Conner, 32, has big shoes to fill on the dance floor, as his wife, Whitney, 33, and her professional partner, Mark Ballas, made it all the way to the semifinals in season 34 last year. Whitney has parlayed her success on Dancing With th...