The landlady says, “How many rooms would you like, sir?” at Lan Wangji, in a way that strongly implies that Wei Wuxian had better not be chasing after a handsome alpha cultivator trying to return him to the bosom of his family before Wei Wuxian managed to irretrievably compromise himself.
Wei Wuxian opens his mouth to say “Two, please, auntie,” in an effort to save Lan Wangji's reputation, but before the words leave his mouth, Lan Wangji says,
“One.”
Both Wei Wuxian and the landlady stare at him. It's clear that the landlady is trying to figure out if this upright-looking cultivator is the one actually taking advantage of a scrawny omega with donkey shit on his boots, but Wei Wuxian isn't much less confused.