Responses
I thought that her sister couldn't have children, and that was the sister's regret.
if the guy is a prince then, he would be like the FL's nephew(?) but probably a child from another woman.
I agree with a child from another woman who was probably sent away or something.
Sorry my mistake is not her sister but 2nd princess from robert family gave birth a boy maybe that boy is that guy
I think the guy is the son of his sister cuz you know the queen is her sister then the guy must be the first prince