Thomas was letting Lena cook, because while he didn't suck at it, she was better. Instead of helping, he was sort of hanging about, watching her progress and taste-testing because food was awesome.
There was a knock at the door, and Thomas rose to go pull it open. He found a scared looking Jayden standing there, holding a gift bag and a balloon that said 'happy birthday!' on a red string. "Am I too early? Oh...I mean hi, sorry."
Jayden's insecurity made Thomas want to hug him, but he refrained. "Come on in, you're not too early. JAMIE! IT'S JAYDEN!"