"Anywhere that's comfortable for you," Peeta says, giving her a reassuring smile. "I really would rather it look sort of natural, you know? So just pretend like I'm not drawing you and we're just talking like we usually would."

Posed portraits have their place, yes, but that's just not what Peeta wants to do. He's always had more of an appreciation for the natural and the artfully messy, so he'd rather draw Sansa and catch her in a moment that's real than something posed and Capitol-esque.