Nathan.
The blizzard of confetti that had just came crashing down upon Nathan's head was revealed to be, in part, thanks to his mother, who was still holding the empty bag halfway over her head when the storm started to clear. It had been a long time since she had actually celebrated Nathan's birthday in any manner which would be dubbed as festive. Giving someone a present each year to mark the occasion was mostly to show him that she hadn't forgotten and that she did still care, but it wasn't anywhere close to the type of atmosphere that this engendered.
She had smiled when the door had opened and was laughing in earnest by the time that the confetti had all settled on the ground and the bag had been lowered and tucked into her hand. "Happy birthday, sweetheart," Angela said, stepping forward and wrapping her arms around Nathan's shoulders, pressing a light kiss to his cheek. "How's it feel to be over the hill?"