While I don't normally comment on the chapters of a story, I do on the story as a whole when I've been moved enough to do so. I generally run back through and read any comments by other readers and the comments left by authors, if they respond, before doing so. The reviewer, William, brought up a good point though. I also was thinking, 'Ah, crap!', when Justin became involved. I'm glad my interest in the story propelled me to read on though. I think you integrated that plot twist into the story very carefully through following chapters.
As to your reply to William, i find your response interesting. I don't think that had I read this story on another site geared more toward the sexual aspect of things that I would have found myself interested for the sex. There is just enough naïveté at the beginning of the story and then too much of an emotional aspect to the sex later to find it titillating. I do admit to glossing over some, but not all, of the descriptive sex scenes to move the story along at a quicker pace.
Now, after having exhausted my own creative writing skills on this chapter, I will have to think carefully before responding to the story as a whole. Cheers.