You told your Mom about the dreams you've been having - dirty dreams about her. They involve your Mom being a giant woman towering over you, leading to your ultimate worship of her. She seems to like this idea, as she replays the thoughts... GODDESS MOMMY! She loves it.

The thought never crossed your mind that she may have any powers like that, where she could grow or you would shrink. However, when she kisses you, soon after you begin to shrink... And all of your dreams come true.