Reasons.

"Xing Xing, I am sorry for what I did at that time. It was my mistake that you are going to suffer in future if Xie Jayden knows about it. But you need to trust me whatever I did at that time was the only option I had left with, otherwise, do you think I could have taken that decision?"

"In this whole world, only you were there for me to share my heart with. I was your grandma but you were my best friend. I would have never taken that decision if I did not want to save all my grandsons at the hands of death."

"God knows I have hidden everything from Xie Jayden that time but I needed to do it. I needed to make that decision to save both of you at the same time without anyone knowing about it, especially Xie Jayden and this was the only way for it. I hope you never acquire those memories of the past that do not belong to you, Xing Xing. They will only hurt you and him."