This is beyond frustrating! Even if something wrong will happen after explaining it, you still shouldn't assume something will go wrong before you even explain. Explain it to the prince, then let the prince decide whether he reveals it or not, he brought you there for that reason! Whether he'll be horrified after learning the truth, it's his own judgement! And yet that prince, is he for real!? Even if he doesn't believe in the rumours, since he brought her there, the least he could do was to de-escalate the situation so that it wouldn't make her impression even worse! What, "it's your own undoing?" The hell!? I thought he should've at least investigated her or something, about her personality or her character! At least his understanding enough that her not explaining immediately has a reason but still!!