Essence Atkins, Coby Bell. Robert Voets/CBS Poppa’s House is staging a reunion between Essence Atkins and her Half and Half costar Coby Bell — who is now playing her ex-husband. In Us Weekly‘s exclusive sneak peek from the Monday, March 3, episode of CBS’ hit sitcom, Ivy (Atkins) is joined by Poppa (Damon Wayans Sr.)…