[ It doesn't take long for Derek to realize what Tate must've seen, and - rather than feel shame, or-- or anger at being spied on, or anything like that, Derek just feels a sense of closure, finally understanding what it is Tate's been so upset about. Now that he knows, maybe he can fix things. ]

That's what this has been about?

[ It makes sense, now - the spike of jealousy, the text messages. The way Derek probably ruined Tate's mood by assuming Reggie was the one behind that anonymous message. He sighs, leaning forward, trying to gather his thoughts. For now, at least, Kavinsky stops being an important part of this conversation. ]

It was-- I get why you'd be upset. I can't stand the thought of you with anyone else. I know that that's - just how the city works, but - I'm sorry. I wish you hadn't seen that.