Well you see, when a momma dragon and a dadda dragon love each other a whole lot...

[The narration did mention the relation to Sokka.
Bumi stops himself mid digression just long enough to laugh at his own joke, going so far as to wipe tears of mirth from his eyes...but forgetting that he had fire flake crumbs on his hands.

Ouch, that's going to smart.]

Druk's from the egg that you and Dad tried to steal from the Sun Warrior temple.