No, there isn't anything wrong with it at all. Faolan just isn't used to such treatment, not even from Lancelot himself. He doesn't think he could sit back and get such a royal treatment all the time. But it had been his birthday, and... Well. He's grateful that Lancelot cares this much, to be honest. Even if he's not quite sure how to respond to all of it.

He still hasn't given him a direction whether to open the gift before or after the cake. Faolan's ingrained manners tell him to wait until they're finished. But Lancelot doesn't seem the sort of man to sweat that sort of a thing. (And honestly he'd prefer to have the other man preoccupied with his food than watching him struggle with his emotions.) He takes another bite of his cake, reaching for the card as he does. He snorts slightly as he reads it. He wants to make some sort of a quip about how he's got everything but the inappropriate part figured out, but he's pretty sure that he's got that covered at the moment now too.

"I'm surprised it doesn't have a dog on it," is what he decides to quip instead, hoping it will deflect well enough besides.