Zuo Ling made up the story about the past pregnancy; his goal was simply to make Shangguan Xi believe him.
After all, the Zuo Family had only moved to Beijing twenty years ago, and many old neighbors weren't clear about their old affairs, so even if Shangguan Xi had the intention to inquire, she wouldn't find out anything.
Shangguan Xi nodded, "Oh, I see."
Zuo Ling continued, "My mother still remembers my unborn sister to this day. Every year on Tomb Sweeping Day and the Cold Clothes Festival, she burns paper money for her. Xiaoxi, you must remember never to bring this up in front of my mother; I don't want to resurrect her grief."
He knew Shangguan Xi too well; she was simple and kind-hearted. Considering his mother, she would not ask his mother to verify this.
"Mmm, I understand. Don't worry, I won't say anything."
"That's good then."
As the conversation ended, Shangguan Xi added, "By the way, Zuo Ling, there's another thing I want to make clear to you."