Celeb spawn Rumer Willis has started a romance with actor Jayson Blair, star of “Hard Times of RJ Berger.” The couple was spotted cozying up at Hollywood hot spot Bagatelle LA the other night. Witnesses said Rumer arrived at the restaurant alone Tuesday and joined the party of 10, sitting next to Jayson, who had saved a seat. The spy added, “She sipped on bourbon, while Jason draped his arm around her the whole evening. The two were holding hands, flirting and canoodling.” They later went to Hollywood’s Sayers Club, where she performed several songs.