Playboy will be a plot point soon on “The Real Housewives of New York City.” The magazine is set to publish semi-nude photos of Kelly Bensimon, 40, in its December issue, In Touch reports. “It becomes a big deal on the show,” which is currently filming, an insider said. “Kelly is telling everyone that she might be on the cover.” No one in the glossy’s Chicago offices could be reached. But word is Kelly’s ex, fashion photographer Gilles Bensimon, took the photos a few years ago. One source said, “They’re sexy, but they won’t set the world on fire.”