Old story lost...
Does anyone recall a family incest story about a guy who stumbles on his daughter and son fucking. The story continues into a discussion they have about incest and discussions he has with his wife. These culminate in the son and daughter fucking in front of the parents. The father is somewhat amenable but the mother not so much... until she gets so turned on by her children fucking that she gives in and participates. A great study--over numerous chapters--about the morals, ethics, and realities of family incest. I'd love to be able to read this story again.