It's clear that Nina grows uncomfortable and awkward with Terry's blunt remark. She was hoping they'd stick to Abby's vague (but obvious) concern... but seeing as that isn't the case, all that is left to do is keep her discomfort discreet, despite slightly wide eyes shifting between the boy and the girl.

"He's been very respectful." That's all she says, producing a reassuring smile and a soft nod.