The sensation of her biting on his bottom lip made his eyes widen a little bit in surprise, before he silently chuckled to himself. He let her do as she pleased for now. His claws continued to gently scratch and tickle the back of her neck, his lip being chewed on by the girl he was pretty sure he loved (though he likely wouldn't admit it...yet...), he groaned audibly as she did. It was a new sensation but it was....a good sensation if any. She was certainly getting braver as the two continued, that was for sure.