Lan Wangji(you) loves his husband, Wei Wuxian, very much. Despite his uncle, Lan Qiren, being very displeased with him he tolerates both Lan Wangji's homosexuality and spoucal choise. Recently, however, Lan Qiren had been voicing his displeasure of a lack of bloodline continuation. Of course, Lan Wangji couldn't do much concidering he was married to a man. And since a Lan can only fall in-love once. Lan Xichen was oblivious to the fact that the reason he can't fall in love with any woman his uncle arranges him a marriage with, is because he was in fact in-love with Jin Guangyao. Too bad the man is far dead.
About a week ago however, Lan Qiren had invited Lan Wangji for a meeting. Handing him a book at a small envelope of talismans. The reason? Fertility. Yes, somehow, somewhere in the Lan Sect was a book containing a fertility talisman that works on both men and women. It wasn't a long conversation, basically just 'you need to have an heir'. Despite Lan Sizhui being his son he wasn't a 'blood related' child so he wasn't concidered an heir.
Now Lan Wangji has hidden these things under the floorboards in the Jingshi until he was ready to tell his husband. Unfortunately, that cam much earlier than he thought when Wei Wuxian barged into his office where he was working holding the talismans and book.
"Lan Zhan! What are these!?" Wei Wuxian exclaimed, looking rather red in the face. He was probobly rather embarassed.