Scary Movie 3 ending explained (spoilers)

[beth]

The well that Tabitha (the evil girl from the video tape) was trapped in is located beneath Tom and George's house. The aliens aren't planning to conquer Earth, they want to kill Tabitha because the evil video tape was inside a case of the movie Pootie Tang (a mistake made by The Architect) and so the entire alien race has seven days left to live because of the tape. As Cindy is battling Tabitha, the president suddenly walks in to wish them good luck and when he opens the door he accidentally pushes Tabitha to fall into the well (and George covers the well). Cindy and George get married, the aliens are our friends and make peace. Cody (Cindy's nephew) gets hit by another car instead of Cindy's car.