Originally when Mo Xuan Fei saw Qianru was walking alone absentmindedly, he didn't want to approach her, but another speculation slipped in his mind.
The matter in the border started only a day after Xiao Jun arrival, one could say that it was merely coincident, but Mo Xuan Fei wasn't someone who belief that kind of event.
Actually many people had pointed their suspicion toward Xiao Jun, but there was no solid evidence to prove his involvement.
And after his encountered with Qianru in addition to their short conversation, Mo Xuan Fei was quite sure that Qianru also didn't know about what Xiao Jun was planning.
However, the way she lied to him about Xiao Jun's whereabouts and took a blame of her husband absent at the court meeting, told him that she wasn't that innocent about the whole plot.
The best guest that he had was; Qianru knew that her husband was up to something, but her husband didn't say the detail of his plan.