Say It Isn't So(2001)

movie - first aired/released 2001-03-10 - 95 min - audience 4.8

Comedy, Romance

Directed by J.B. Rogers

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.