Mommie Dearest is indeed fiction. It was created for entertainment purposes and doesn't represent actual happenings. The story and characters are fabricated to engage the audience.
A'mommie fantasy' could be centered around the idea of a mother as a source of infinite wisdom. In some fantasies, the mother is seen as someone who has all the answers to life's difficult questions. It can also be related to the fantasy of a mother as a great storyteller, who can transport you to different magical worlds with her tales. Another aspect could be the fantasy of a mother's unwavering support in all of one's endeavors, no matter how crazy or impossible they seem.
Mommie Dearest is not a true story. It's more of a creative imagining or fictionalized account rather than being rooted in actual happenings. The plot and characters are crafted for entertainment purposes.