Almost everyone has remarked how Lois has trusted Clark so quickly.
Well, in OUR world, she warmed up to Superman right away. Why wouldn't the same thing happen here? She is meeting the real Clark, which OUR Lois didn't have the opportunity to until he revealed himself. She is a little infatuated with his great looks, as well as his powers. But his goodness and sweetness is what is really winning her over in her heart.
That was my perspective writing this, anyway!
