Hitler's official photographer - Heinrich Hoffman - upon returning from Moscow in 1939 in company of Ribbentrop, wasn't even allowed to publish photographs of Stalin smoking, deemed inappropriate. Hitler was very picky as for what should be filtered through the state propaganda machine as the public image of the Führer had to be maintained firmly. That makes one assume, even if a scene like this has ever taken place (which is improbable given Hitler's almost ever permeating formality and coldness in interpersonal relationships) that picture like this would have never been taken.

It's art by Alison Jackson. She made more pictures like this: http://www.alison-jackson.co.uk/mental-images/

Edit: It's not on her website as far as i can find. But two years ago somebody posted this photo: http://i.imgur.com/TrT0KCl.png and then it was up on her website.