Luna might see the hurt in her eyes, but there's absolutely nothing in reply. No sympathy, no apology. There's not even some kind of satisfaction of winning this particular fight. There's only a nod when Luz tells her she understands, that's all she needs to hear.

"Don't follow me."

And with that, she turns to leave. She keeps the charm in place to keep Luz pinned just in case she has other ideas. It's only once she's at a distance does Luna release her, but better for Luz's sake she stays down until she's out of sight.