Amal Clooney had twins 3 months ago, at least that's the story they're telling ... but judging from this pic we have our doubts.  

George and Amal chowed down with Matt Damon and his wife, Luciana Barroso at Ristorante Da Ivo in Venice, Italy.

They're in Venice for the 74th annual Venice Film Festival, where George is unveiling his new movie, "Suburbicon."

They just do it better than everyone else. They just do.