Just as Nianzhi was about to go upstairs with Si Wan, Nan Sichen stopped him, his voice gentle, "Don't tell your mommy that you met uncle, okay?"
"Why?" Nianzhi blinked his eyes, "Didn't uncle want me to call you daddy? You can meet my mommy."
"This is our little secret," Nan Sichen said softly.
Upon hearing the word 'secret,' Nianzhi blinked twice and then joyfully laughed, "Okay, I also have a secret now."
Si Wan watched from the side, letting out a slight sigh. Clearly, they are father and son, clearly husband and wife, yet they can't acknowledge each other, can't meet.
"Take him upstairs." Nan Sichen instructed Si Wan calmly.
"Yes."
Returning to the car, Nan Sichen didn't drive off immediately but instead looked up at the tenth-floor window.
For a long, long time, before he drove away.
