My husband, who had been living apart from me for three years, seemed to be dating someone. On his thirtieth birthday, I went to his city to see him. He took me to dinner with his coworkers. At the table, he ate the leftovers a female intern couldn't finish. When she nearly fell, he hurriedly reached out to catch her, grabbing her butt. In that instant, I understood just how far things had gone between them.