Even if he appears kind and benevolent, it is definitely not real, but rather a trick Si Lingtian uses to deceive Gu Xiaonuan. If Gu Xiaonuan truly believes it, then it only shows that she is naive, unable to see that Si Lingtian is the mastermind behind everything.
Si Lingtian planned all of this, including the meeting between Gu Xiaonuan and Si Yuchen; that was also part of his plan.
He orchestrated so much, ultimately leading to the situation becoming increasingly worse.
Si Lingtian wanted Gu Xiaonuan and Si Yuchen to meet, so the two indeed met. Meanwhile, Gu Xiaonuan hoped they could return to the past, yet Si Lingtian's presence prevented Si Yuchen from being able to agree to it, to agree to divorce her.
Si Yuchen is also constrained; if he could, he would want to set Gu Xiaonuan free.
But in the end, he cannot set her free; if possible, Si Yuchen would also want to resist Si Lingtian.
