By the time you figure out the rules I broke

Huaisang hesitates before answering, looking to Lan Wangji for a long moment. As merciless as his temper can be, he's not an unkind person. He's not someone who delights in unnecessary cruelty toward others or takes sadistic pleasure in their suffering unless he's been given specific reason to. He's been told not to speak and truth be told, he doesn't really know Lan Wangji all that well just from what he's observed of the other boy and everything Wei Wuxian has told him about him.

Jiang Cheng needs the distraction right now so he continues to speak quietly as he pulls on his robe, further impudence but necessary he thinks.

"Oh, it was just the usual. 'Lan Zhan, this, Lan Zhan, that...' You know how he gets. He's been wanting to know about him, how he's doing, what he's been up to... If he's seeing any girls... You know, that type of thing."

Of course, Wei Wuxian's letters hold a lot more than just that, too, but that's all Huaisang's willing to disclose right now. He finishes getting dressed and waits for Jiang Cheng to do the same. Then he simply takes the other boy's hand and holds it.

No matter what happens now, they're in it together. Jiang Cheng won't have to deal with the fallout of this alone.