1: After School Job by Lubrican The pregnancy stuff is not for me, but other than that this story builds the relationship between brother and sister very well.
2: Helpful Hannah by Pan A hypnosis story from the point of view of the "hypnotee". Great slow build of the sexual relation between brother and sister.
3: The Tutor by Cotton Nightie For me the balance between straight and gay male sex in this story is just right. That's probably thanks to the fact that the story never got finished, even though it feels kinda finished to me. Anyway, it's a balance that is hard to find in my experience.