I will never regret it

However, Song Yan knew that she couldn't just exorcise Lady Yan without Xi Sang's permission. If she was to deal with this ghost and something happened to Xi Sang instead then it will be twice as much trouble.

Thus, she turned to look at Father and Mother Xi who seemed to be on the verge of agreeing because of all the threats that their son was handing out and then said in a calm voice, " Though I have nothing against Lady Yan, I will like to remind you all that the relationship between a ghost and a human can never be as beautiful as you are thinking. Ghosts who remain on the surface of the earth are bound to have some sort of intentions or grudges." 

She then turned to look at Yan Wuying and casually added, " Lest something happens, it will be too late for you to do anything."