Could Derek Hough be back with his ex-girlfriend, Nina Dobrev? Could Derek Hough be back with his ex-girlfriend, Nina Dobrev? YouTube Star Bethany Mota Dishes On Her Success, 'It Just Kind Of Happened' As rumors continued to swirl, as they have for months, regarding Hough's relationship with his Dancing With the Stars partner, Bethany Mota, a new report has surfaced, claiming the dancing pro may have gotten back together with actress Dobrev.