Liu Hui Ying winced, she hoped that she hasn't done anything while drunk but looks like she did do something and from the looks of it, the Emperor knew of it. If he knew that she was in the brothel, then surely he knew about the rest of everything that went down the rabbit hole. She raised her hand and then nursed her forehead, she was willing to lie to herself and think that there was nothing that the Emperor saw but from Qui Ai's words, the man ran away after laying her down on the bed, surely he saw something that terrified him and there was nothing that Liu Hui Ying could do about it.
Was she supposed to ask him what he saw? But she already had a good idea about it did she not? She must have done something similar to the time when she lost control years ago and as for why she did it… it was better to not know about it.