There's a part of him that knows he should probably be jealous. Maybe she expects him to. But despite their tryst in the woods the last time they saw each other, he doesn't have any expectations from his relationship with Diana. He's simply happy to have her friendship.

"Really? Tell me about him." There's a beat. "Or ... her, if that's the case." It's not common, but that doesn't mean it doesn't exist, especially among vampires.