Comment by SalientBlue

Yes. The joke was that Person A's comment, replying to an article about Jones, makes it seem as if the 'he' in the line is referring to Jones, not the baby Messiah from the movie. B then subverted the expected conclusion of Jones' line "...he's a very naughty boy" with a fact about Jones himself: "he's the actor that played his mum". Person B was aware of Jones' line and played off it.