https://www.smashwords.com/books/view/979263
René has been adopted into a new family under unique circumstances. The quiet young woman keeps to herself and studies hard and is accepted into the same college as her stepbrother, much to his dismay. But what he and his family don't realize, is that René has a very big secret - so big, it is like nothing anyone has ever seen or experienced. Once her body develops into a mature young woman, she sets out to explore her unique sexuality and her own family becomes her target due to the skeletons they have in the closet.
This story contains futa on female and futa on male, as well as TABOO stepsibling and stepmother intercourse, and impregnation.