Nicole Kidman and David E. Kelley are teaming up for a sexy HBO murder mystery, centered on an affluent circle of stylish, successful, and oh-so gossipy private school moms in a rattled world of wealth glamour. Sound familiar? It's not another season of Big Little Lies, but the creator and co-star of the breakout HBO reuniting for a new juicy thriller with The Undoing. Kidman stars as Grace Fraser, one of those women who seem to have it all, with a respected career as a therapist, a loving husband (Hugh Grant) who's a pediatric cancer doctor, …