Have you heard the news? Kristen Stewart cheated on Robert Pattinson with her Snow White and The Huntsman director, Rupert Sanders. Annnnd, the world has pretty much imploded in a collective fit of ugly crying. In fact, Twitter has straight up broken. Before you mourn the end of Robsten, check out these Teen Mom cheating scandals. There's light at the end of the tunnel, y'all, and if MTV's Teen Mom mafia can get through the rough times, we have total faith in Rob and Kiki. Kyle Regal Cheated...