While looking for the Transformer trailer on yahoo I stumbled across this featurette produced by the screen writters to address the early leaks from the movie. Probably a couple month old because it was done during the choose primes lines contest. It runs around 35 minutes long and it makes me feel a little better the movie this summer.
I could buy that. We certainly don't know that much about Nathan's background and the idea that he had a one-night-stand with Claire's mom obviously isn't out of the question considering what happened with Niki.