A father lusts for his voluptuous teenage daughter. When the opportunity comes for him to tutor her, he seduces the not-so-unwilling girl. She herself, though shy, craves for fun.
You work hard over many years to bury a secret obsession, but then everyone's saying that you married a woman who looks like your sister's sister. Maybe something like this might happen next. Apologies for not giving this the print-out/red-pencil treatment.
When a snowstorm keeps his wife and son from coming home, he's left alone with his 16-year-old daughter in law, who he has been lusting after from the time she moved in with the family. The girl was still feeling bad that she had had a miscarriage and still wanted a baby. This is the first night's venture into extramarital incest.
Lori and Tommy are fraternal twins. Lori pulls her back and Tommy offers a massage to help relieve the pain. Initially skeptical, Lori finally gives in and accepts Tommy's offer. Twin versions of the same story, fraternal in their own right.