"That was it?" Stiles asked turning slightly to look at Derek with disbelief on his face. Anything he had done wrong in front of Eterna had caused Alison either pain or humiliation. But then Derek wasn't Eterna and Stiles was beyond grateful for that.
To show how grateful he was, he turned completely back around and moved into Derek's space as his mouth found the werewolf's again. He was begin to really like kissing Derek.