Naomi Watts and Liev Schreiber are enjoying quality family time in the Hamptons. Watts, who plays Princess Diana in biopic “Diana,” due in September, was seen with her husband, their two children and a few friends at Mexican restaurant La Fondita Wednesday night. Witnesses say they then headed to Amagansett Square to catch Hamptons Drive-In movie “Wreck It Ralph.” Watts has gone from playing Diana to a pregnant prostitute in “St. Vincent de Van Nuys” with Bill Murray.