Mom, Dad n Son(Hero)
Boy saw girl, lovd her.
Luckly she cums opp to his house, he proposes her
Love goes smoothly
Dad saw son wid gal
-INTRVL-
Dad- who's tht gal..?
Son- I Love dat gal & i wil marry her..
Dad is shocked..!!
Climax,;
Dad- imposible, she's ur sister, u cant...