Beautiful Lady Nuan certainly knew that Jian Xubai was the crown prince's follower.
So after she said that, Jian Xubai asked her knowingly, "What do you want?"
After all, once the news that Consort Cui attempted to murder Emperor Xianjia was revealed, even the emperor couldn't keep the crown prince's title as heir to the throne. Any people who hoped that the crown prince would take the throne definitely had only two choices after knowing this news, killing her to keep the secret, or buying her over.
It was outside the emperor's bedroom, and the emperor was talking with the crown prince inside then. Even though it appeared that there was nobody outside the bedroom, Jian Xubai wouldn't do anything to Beautiful Lady Nuan. Moreover, even though he didn't have feelings for the beautiful lady
