[ The mention of a family has Xichen reminded of what Wangji said. He wasn't going to broach the subject but pretending he doesn't know something is tantamount to lying, acting dumb for no good reason, so he tries to delicately approach the topic. ]

Wangji, while recounting that he knew you, also mentioned you have a soulmate who was here ... I suppose, the 'last time', we could say? I only bring it up to admit I know such a thing when it is entirely your business to divulge and the choice was not yours to tell me on this occasion, not to pry.