What if they are actually the Cullens? Peyton is Rosalie. Hayley is Alice. Lucas is Jasper. Perhaps Nathan is Edward and Brooke is Emmett. Karen is totally Esme, and Keith is Carlisle.

Perhaps your watching experience will be improved if you watch with this in mind.

(Of course, this results in a few weird inter-Cullen pairings. Jasper/Emmett, anyone?)