I don’t like your boyfriend, let me be your new one (слэш)

From a prompt where Lan Zhan is drunk and forgets he’s married to Wei Ying. :-)
You should be my husband instead,” Lan Zhan announced as they walked out into the night air.
“Oh really?” Wei Wuxian said. “And why is that?”
Lan Zhan snorted. “Because...look at me.”
Wei Wuxian smiled. “A good argument, well made.”