Umm I'll join, why not?
Edit:
This is a review of the entire story, not just 7-20
SPOILERS CONTAIN SPOILERS
As for Sorority Sisters by Blood goes, even though most would think it's a little extreme. It works well with the context of the story, which many writers don't seem to be able to do with a story that has a lot of sexual nature.
Usually the storyline has nothing but sex. Sarah did a excellent job at overcoming the challenge and kept the storyline in line with what was going on.
I also like how even though the story had some very minor incest, it was very natural and flowed together nicely. It wasn't done just to be done and fit into the story well.
Spoiler:
Along with the edgy scenes with the girls videos which also fit very nicely and again worked well with the story.
Along with those, she covered a lot of extreme topics and it flowed and was done incredibly well with not too little detials but not too many detials either.
The only issue I really have is you can see some typos and I felt it was kinda distracting to the eye. (There isn't a lot, the typos is a very minor amount.)
And I feel maybe it could've been edited a bit more to avoid the typo issue.
Overall it is a good story. Like I said, my only issue is the typo issue which is a very minor issue.