Even though Bai Cheng'an has a sister, Bai Qingqing, she is not his biological sister, and they didn't grow up together, so he can't understand the feelings of Qian Sisi as an elder sister. It's said that the eldest sister is like a mother, which isn't an exaggeration.
"Okay, okay, I don't get it!" Bai Cheng'an coaxed Qian Sisi, "Why not go to sleep first? You've been with Bai Yumo all day and must be exhausted!"
During this rare break, Qian Sisi spent the entire day with the child, barely even having a moment to drink water. Bai Cheng'an saw this, and it pained him. Naturally, he didn't want her to stay up waiting for Qian Chen.
"But..." Qian Sisi hesitated, unwilling to go to bed.
"I'll wait..." Bai Cheng'an said, "You go to sleep first, and when Qian Chen comes back, I'll have a good talk with him! He listens to me, the brother-in-law, quite well."
Qian Sisi agreed after some thought.
