I've seen all the comments hating on the emperor, but I don't know why. He's the EMPEROR of an entire kingdom. He hired an ASSASSIN to use her for her professional services. ie Killing and gathering intel. OF COURSE he dug into her past. It's the smart, wise, and rational thing to do. His attraction towards her is as we've all seen: childish and immature. That's because she's different to the ACTUAL concubines that he has. As an emperor he most likely has been involved in politics since birth and doesn't know much about the outside world. They showed that last chapter. If she threatened him, then he would remove her from the contract. That's what any smart person, let alone ruler, would and SHOULD do. The only mistake he made was telling her he looked into her. However, if she had ties to an EMPEROR KILLING rebel faction then by all means he should question her. Even then, If he had locked her up to interrogate her; she would have been on guard and unwilling to talk. Doing it in a friendlier environment was still the smarter move.