A few weeks after Wei WuXian returned from the Burial Mounds, on a rare day when his shidi was not around to shove his blinding desire for revenge between them, Wei WuXian had followed Lan WangJi back to an inn to talk. The conversation had grown heated. Liquor had been involved. Their relationship had changed.
A canon divergent fic in which Lan WangJi and Wei WuXian end their arguments by screwing rather than walking away, but Wei WuXian hasn't caught feels yet.