Anduin senses the spirit moving on or whatever it is that happens after their last wish is fulfilled, which is the only reason that this whole thing had been worth it. Quickly excusing himself to a quiet corner, he does his best to wish himself invisible -- which is when he notices that he has a new message waiting for him.

From Hermione.

He glances up, casting a quick, embarrassed glance around the deck before their eyes meet and Anduin's face grows, if possible, an even deeper shade of red.

That was not one of my finest moments.