[Wei Wuxian grins in an effort to conceal his increasing nerves that he is feeling for no reason other than something about Mal's perfectly reasonable expression. (Her far too reasonable expression.) He represses the urge to snatch the paper from her hands, aware that it would be...revealing.]

A dog? [He asks, incredulity in his voice and only some of it for the way she says "Lan Zhan" and a part of him revolts with it.]

No, because a dog implies one, when in reality, there were many, all the time, every day! And don't you try and tell me how sweet and cuddly they are, I don't want to hear it! I will not be swayed.