He raises an eyebrow as you mention Fluttershy. "Oh her," He looks over to where she's standing before turning back. "Sure, go ahead and let her know."
Fluttershy doesn't notice your approach at first but does spot you before you arrive giving you a welcoming smile. She listens as you tell her you're going to have a talk with Thunderlane. "Sure, if anyone asks about you, I'll make sure to let them know." Her smile doesn't change at all, but you could swear you saw a glimmer in her eye. "Have fun with him."