First of all you don't have a story - you have the beginning of a story. At this point we have only a few answers to the basic who, what, where, when and why. which makes it hard to form a real opinion. It appears that this story is going into a dark area, like a Cinderella in reverse kind of story. You've established the stepmother's ability to emotionally blackmail the protagonist and we know it's going to involve a potential sex change. Beyond that is all conjecture. The stepmother and he are the same age so the New Daughter title is misleading at best. Whose daughter? There is a hint about him being a look-a-like to some royal female which leads to the suspicion that we have an Anastasia story here with a TG twist but maybe I'm reading too much into too little. That's the danger of trying to build suspense - you need to give out just enough info to make the reader want to know more. You've done that up to a point but it's so vague that you may lose a lot of readers especially if they have to wait for the next part. It's hard to maintain suspense when it's spread over too much time. You need to give us more to make a better judgement.