After Kotake and Koume used their powers on Ingo to brainwash him into killing Link while Ganondorf and you were watching, Sheik enters the room. When the twinrovas see him, they seem to get a little bit flirty with him.

Kotake: Oh, hey Sheik.

Koume: Can you play a tune on your harp in honor for my beauty?

However, Sheik didn't have much reaction to that as he ignores them and report to Ganondorf that Link is being trained by Impa and that he's getting stronger with each passing day.