The only reason I didn't give a score of "10" across the board was simply because nothing is perfect!
That being said, this is definitely one of my favorite stroke stories.
I usually like stories with more substance, but, I have to tell you going in, even though I knew it was going to be YAIS (Yet another incest story) it really did take me by surprise. I was delighted in how the author handled the buildup.
Fantasy 69 really does know how to get one's heart pumping. "Forbidden" subject matter (incest, because yes this is an incest story essentially) aside the treatment of our heroine's journey into her dark side is very well done.
From Chapter 1 where we're introduced to Kate by her own description of herself, what she had "volunteered" to get herself into her hobby photographer son and the situations she seemed to find herself from that point on are, for the most part, handled with a lot of what I like to call "teasers" and expressions of anticipation, anxiety, doubt, fear and excitement, all while knowing full well she loved what she was getting into and made the discovery about her true slut self.
For those of you who really get off on that kind of stroke story "telling" this is for you! I rate this up there with Sam Slam's "Big Sister's Wedding" which is also a well written piece of erotica dealing with the same genre.