Inigo hardly seems to mind the slight slip. It happens to the best of them, and Nita is still learning - still in the first initial stages of it, in fact! So all he does is smile a bit at her 'oop', trying to near-still for a moment so she has the room to correct herself, rather than having to do both that and catching up with everything at the same time.

"Have you thought much about learning to dance before?" He instead asks, though making sure she's back into the swing of it all before he starts distracting her with spoken words.