Why were the kids with their grandparents and not their parents?
Oh wait, you mean De Niro and Pfeiffer were supposed to be their parents?
Both are pushing 70 and 60, yet their kids are teenagers?
Maybe that would be plausible for Y generation parents (freezing eggs for starting a family after 40 and having established careers and crap), but these are supposed to be a typical goomba Eyetalian greaseball mob family! The kind that takes their cues from The Godfather and GoodFellas to know how to act (it's real, actual real life wiseguys take their cues from mob movies).
These types and the Jersey Shore trash women they marry don't put off kids until they're 50!!
Too absurd to take remotely seriously, and for a Besson flick that's saying a lot...