Draco should continue to be worried. He really should. But he's quickly come to realize that these two are far too pissed (or otherwise) to actually figure out who he is, observations aside. And so: his smile is a little more like gritting his teeth, but he could still have some fun with this. They're not going to remember it later. "Begging your pardon, your Highness. It's just that you look even younger than you do on the ten pound note," they're not going to know what he's talking about - he barely does - "I could hardly recognize you."

His lips curve up further at the corners as he looks at Lucius, giving him a look that appears to be I know, I know, I'll play along. It's not really, but it's a good fake. If Draco felt more in danger he would probably have more of a meltdown right here in the aisle but... He knows that this is just a game they're playing to try and lure the muggle in, but, well... Right. Chocolate for Rodolphus Lestrange. Who is, thank Merlin, definitely not here with them. "I don't mind helping out the Queen and her entourage," he adds on, mildly.

A beat. "Yes. Wife's out of town and I'm useless in the kitchen." Might as well play along for now.