This takes place a few months after part three, a new student arrives changing Steve's entire dynamic at school.

Autumn Sky:

I opened my eyes. The ceiling of my bedroom was obscured and it took me a moment to realize that it was someone's hair falling over my face. It was my sister's hair to be precise. She was lying on top of me, her nude form pressed tightly against my own. I could feel her tits and nipples against my chest as well as a much more intimate sensation around my nether region. She was impaled on my cock and it was hardening by the second. But she had...