Manipulative, bad or evil Sister who is in an incestous relationship with her brother?

[SS100]

Does anyone know any medium i.e. longer than 15,000 words, stories that fit this? Just the two of them basically. Younger sister is preferred.

 

[TheArsonist]

There's a good one by @cigarettelion called Aspirations of a Psycho Slut that fits your description pretty much exactly (although she has sex with other people as well). I think it's rated lower than it ought to be only because some readers couldn't handle a truly sociopathic female main character.

 

[SS100]

There's a good one by @cigarettelion called Aspirations of a Psycho Slut that fits your description pretty much exactly (although she has sex with other people as well). I think it's rated lower than it ought to be only because some readers couldn't handle a truly sociopathic female main character.

Any other stories wirh just them 2?