Derek flinches, because he remembers what it's like to be a big brother. He may not be one anymore, but he still remembers. It doesn't matter that it was Thea who started it, or that it was her choice to make. Oliver won't care.

He wonders idly if part of Oliver's strong reaction is because Derek is a wolf, if maybe he's good enough to be friends with, but not more than that. Derek's good mood is effectively soured, and it's a sad testament to his life that he's thankful he got a whole entire night.

Oliver gets up and Derek just nods, looking down at where his fingertips are pressing into the fake-wood tabletop. He wants to say that that Thea is a grown woman who can make her own choices, but he doubts that it would do any good.

"Fine," Derek says flatly, shoulders slumping dejectedly as he pushes his coffee away. Maybe he was right in his initial assumption that sex brings him nothing but trouble, and he should just accept that it isn't worth bothering. It never seems to end well.