Rapper Cam’ron keeps his family close. The “Hey Ma” singer brought his 13-year-old nephew to racy burlesque club The Box for Agenda:NYC’s “Cut Throat Hustlers” event. Cam’ron performed a 15-minute set around 1 a.m., taking the teen on stage with him. “The kid had a mike and was wearing shades,” says a witness. The Harlem-born rapper tweeted a photo of his nephew dancing on a couch.