Say It Isn't So (10/03/2001)

Production : Say It Isn't So Productions, Conundrum Entertainment, 20th Century Fox

Synopsis

Boy meets girl; boy falls in love (and had wild, non-stop sex) with girl; boy loses girl... when they discover they are brother and sister! But when he learns that he's the victim of the ultimate case of mistaken identity, the lovesick young man -- whom everyone still thinks is after some taboo thrills -- must race across the country to stop her from marrying another man.