The Fox is subtle

Chu Yun had no visible reaction to Jin Luan's revelation, in part because it didn't come as a surprise. He wanted to know how Ru Long factored into Xiao Yao's life -- exactly how had Xiao Yao come to have a child that needed to be entrusted to someone in Su?

But he couldn't give his goals away. Not because he feared Jin Luan would relate their conversation to Gu Wei, that was a foregone conclusion, but because he would stop talking if he noticed Chu Yun's marked interest. 

Gu Wei of course wouldn't tell him any more than he already had.

"Xiao Zai must have been a cute child," Chu Yun said, sidestepping the issue briefly. "Sometimes I felt like I've known him for such a long time that it's almost hard to believe that we've been married for less than a year."

That much was true. He did sometimes feel like he had known Xiao Zai all his life. 

Jin Luan nodded in understanding, but added, "I don't feel like that about Gu Wei."