Every couple faces challenges in their marriage, and many struggle with fertility problems. TLC's "The Little Couple," Jen Arnold and Bill Klein, are three years into their marriage and trying to have a baby using a surrogate, so they're facing those challenges head-on -- all while starring in a reality TV show.The couple, who wed in 2009 and appeared in "Little People: Just Married" that year, initially struggled with the surrogacy process as Arnold was unable to produce enough viable eggs.HuffPost Weddings spoke to Arnold and Klein about their marriage, reality TV and their quest for a baby.