Her defensive answer gets a look that essentially says 'calm the hell down'. She does, and he'd like to think it was because of the look he gave her, but he won't admit it if it wasn't.

Harvey's usually pretty cool about almost everything. Almost.

"Why was the first time a mistake?" he asks gently and waits for her answer. Regarding Xander, he nods. It makes sense. Unless she means she 'magic'd' it to be good, then it doesn't make much sense, because why would you want fake good?

Does she remember that wicked shit-eating grin of his? It's back in response to her question about his sex life.