He's not a teenager, he's a kitten who needs to take better care of his hair. At least that's what Sarah will argue if he doesn't cooperate. If not...motherly guilt could work.

"I already ate like I said and if I'm hungry I'll fix something up later." She was preparing for him to pull away to start eating on his own, but to her surprise he hugs her back.

A grin comes over her face as she holds him tightly to her, as though she's trying to protect him from the rest of the world. All the love and affection she'd have for Kira is passed onto him. the hug will last for several long seconds before she pulls back to look at him.

"Go on and eat. I'd rather not have you pass out from hunger."