He should have returned to Avalon the moment that he had felt the summons.
If he had left when he was called, his lord would never have came searching for him. The child's existence would never have been discovered, and his only true friends would not be, at this very moment, fighting to keep young Alexander.
There was only one way to right this wrong, and the Puck knew very well what the consequences would be. No one went against Lord Oberon without paying a price. No one.
"I'm afraid, my lord, that there is one annoyance left."