That amazon review is hilarious. Absolutely awful writing, and to make matters worse, it was originally written as Twilight fanfiction on fanfiction.net. If you read it, see if you can find the parallels between the characters and other bits of the story.
Also, "mommy porn" (as derogatory as that term is) is typically erotic literature or movies that are popular and available in stores, are marketed toward women, and are marked as mature or adult. Apparently women are less likely to enjoy or want to consume the more "mainstream pornography" that is typically marketed toward male audiences.