Wei Wuxian would not want to ever leave his husband. Would not want the dome to take him away from his husband. The other had lived without him for far too long. He does, however, know that if Lan Wangji left then he'd go back to when they'd left off. Something that he didn't want for the other.
He gives a soft smile," Well, it's Lan Zhan's bunny. You'll have to name it."