Aubrey Plaza Talks Filming Sex Scene with Robert De Niro for Dirty Grandpa: 'A Lot of Interesting Stuff Went Down' The relationship between Aubrey Plaza and Robert De Niro in the upcoming film Dirty Grandpa is a true love story kind of. “He’s a dirty grandpa and I’m a dirty. Dirty Grandpa () - Aubrey Plaza Sex Scene [HD] Malaysia (English), México (español), Nederland (Nederlands), New Zealand (English). Robert De Niro and Aubrey Plaza sex scene, from the movie "Dirty Grandpa". HD. Enjoy! The ending scene of Richard "Dick" Kelly make love.