Stiles gave Derek a look that he clearly didn’t believe the werewolf and his protest. Stiles hadn’t seen Allison and Derek together or even heard them together, which he was completely grateful for, but he had seen Derek’s look just now.
“Don’t worry. I’m ok with it,” not the complete truth, “not that you need me to be ok with it or anything. I’m just a slave. But if it helps I have accepted it?” That was the truth and it caused Stiles to smile a little at Derek. “It is ok to admit that you are attached to her. Allison is an amazing girl. If I didn’t think of her as my sister I’d probably be in love with her.”