Here's a nice Valentine's Day story: Sharon Bush, ex-sister-in-law of Dubya and mother of Lauren, has hired the celebrity divorce attorney and author of Schmucks! Our Favorite Fakes, Frauds, Lowlifes, Liars, the Armed and Dangerous, and Good Guys Gone Bad to defend her against her ex-fiancé Gerald Tsai, who is suing to get back a $400,000, 11.07-karat diamond ring he gave her as a Christmas present two years ago. Classy, right? Both the situation and the idea of a J-Lo–style exchange by oldies. Classier still was Felder's statement to the Post this morning. "He doesn't get it," he said. "He knows what Valentine's day is all about. He's a Native American giver." Well! Apparently Felder, whose statement in his book that he "never cared much for men who wear bedsheets as clothing. Like the Ku Klux Klan. And the Saudis" caused Eliot Spitzer to ask him to step down from his position as chairman of the State Commission on Judicial Conduct late last year, has learned a thing or two about political correctness. At least he didn't say "Indian giver."