Teresa Giudice was in rare form at the “Real Housewives of New Jersey” Season 13 reunion, Page Six has exclusively learned.<br /><br />Multiple sources tell us the last-standing series OG was “completely unhinged” and “out of control” while filming with her castmates on Thursday.<br /><br />Our sources say Giudice was “nastier than ever” and “cursing” a lot and that she went so far as to call co-star Margaret Josephs a “f–king whore.”<br /><br />We’re told the mother of four seemed “very unhappy” and “mad at the world” and that moderator Andy Cohen appeared
