The prince of Briar Valley does not curse, because that would be entirely unbecoming. What he does do is hiss, a look of genuine shock on his face when he feels Lilia bite him. It hurts, obviously; Lilia's teeth are quite fierce, if he wants them to be, and it seems like at this moment that is very much the case.

Unfortunately, while it hurts, it's also not bad. The warmth of it, coupled with the way Lilia squirms in his lap, is leading to some... unforseen results. Malleus' whole body is hot, and he pushes at Lilia, intending to get up and- and what? Flee? Absurd; Malleus does not run away from things, but-!