You didn't....

Firstly, Lisa was told that the parents she got to know as her biological parents weren't her biological parents. Then, she found her biological mother but her father's identity became a mystery. Now, the biological father who later became her foster father was suddenly her biological father again? Does it make any sense? Do they want to destroy her brain cells before they settled for a conclusion?

She turned to look at Kim Yong. Everything was making her weak each second. Was this the reason her uncle wanted her to not find out about anything? 

So if Lin Guancheng was her biological father, then Zoe was her stepsister. Why hadn't Lin Guancheng treated her the same way he treated Zoe like a princess? Because he liked her less than his wife did.