Well, what they don't blatenly tell you but seems clear if you watch for it is that Anakin uses the force to make Padme fall in love with him. You really start seeing it when she has an opposing view point from him and then all of a sudden changes her mind to reflect his views in some scenes. It would have been better if it were more clear but it is what it is. Which means that his fall to the dark side actually started earlier.
It's not made blatantly clear because it never happened.