1: Seduction Of Laurie by Charlotte North One of the hottest stories i've read, about a married couple who visit of sex club, and end up deciding to seduce their own teenage daughter. The formerly straight-laced mother ends up loving the idea and is the first one to have 15-year-old Laurie.
Things get kinky as their perverse seduction of their own daughter progresses.
One of the best in its kind, and i personally love this kind.
2: Tale of Two Mothers by John Doelman A deliciously hot story about a son and mother having an incestuous affair, and talking to a female psychiatrist about it, who then becomes aroused by their affair and the idea of incest, and proceeds to seduce first the son, then the mother, and finally her very own son.