There's a quiet beat while Lan Xichen absorbs that. He had his suspicions about 'Mo Xuanyu' since his brother arrived with him. If Lan Zhan had shown any interest in anyone besides Wei Wuxian before or after the man's brilliant and painful rampage through Lan Zhan's life, Lan Xichen would have been... perhaps not unsuspecting, but at least not as on alert.

However, Lan Zhan hasn't abandoned his widower's white since... well. Since. He's made it quite clear to anyone who cared to look that he considered himself both taken and left behind, and didn't care what anyone else thought about it.

(Lan Xichen has been forced to hear many people's opinion of it, at length, over endless pots of tea. It's immensely draining.)

"Have you honestly not spoken with him about this?" He demands, after a long moment to recapture his composure. Honestly, little brothers. He suddenly misses Nie Mingjue's council more than ever.