Accidental Sister Threesome (Reluctant Family Sex) by JB Richards
Approx. 4,890 words.
Published on October 27, 2012.
Matt gets laid off from work and sends his roommate away for a quiet evening alone, but finds his step sister naked in the apartment when he comes out of the shower. An argument ensues, and Matt accidentally finds himself in a compromising position - only to have his roommate walk in!