His eyebrows shoot up at that - Allumin knows himself enough to be aware of when he's completely panicked to the point of sweating and this is not one of those times. Imagination might be going for a bit of a jaunt in a way that makes him flustered, but not so extreme of a physiological response... Not yet.

"Oh, am I?" There are certainly better things he could have come up with, and Allumin won't just let it slide in favor of being taunted.

He leans his head down, lips brushing against Astarion's ear as he speaks in a low whisper.

"You're going to have to do better than that if you want to stay in control of our conversation."