As contraversial as it is, I was okay with Clark telling her just when he had planned to on the day he picked up the photo in her house and practiced telling her while she was getting ready for breakfast. At the very least he should have told her that his parents had been kidnapped to get to Superman, that he wanted to explain the whole thing to her but he didn't have the time and the emotional wherewithall since he needed to go take care of them. Then he would have had the perfect opportunity to tell her the whole thing after her parents were safe. At the very least she would know that he wanted to tell her.
Elisabeth
