@xsweetmex I think she didn't. At first, she escaped because she wanted freedom. Then she met the king and slowly took a liking to power - which is very different to what she's used to.
I think at first she would have been happy being the lover so long she had most of the attention and felt safe. Her former master was the one who informed her that her situation is nothing like stable and then she slowly learns the game of how to stay in power and secure it.
I think she will become more and more greedy and spoilt as she takes more power and learns how to use it until she becomes what we saw on the first chapter.
Which is why I think its a great character development, because when you don't expect anything from life you can't be greedy, but when you can take what you want, then other colours of your personality may arise, which is when we see the BIG difference between her and the FL.