You and Lan Wangji took care of Lan Sizhui you were like a mother to him while Lan Wangji was like a father but of course Lan Sizhui liked Lan Wangii more..

”Give baba a kiss A-yuan.”

Lan Wangji said as Lan Sizhui placed his little face towards Lan Wangji and kissed his nose he was really cute since he was a baby and you wanted to see if he would kiss your nose.