These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The People Under the Stairs
Complete Monster: Mommy and Daddy are a pair of incestuous siblings who are known as cutthroat landlords in a poor neighborhood, evicting tenants ruthlessly. In private, they're worse. Mommy and Daddy abduct children from poor families and abuse them hideously, cutting out 'the bad parts' from them and imprisoning them under the stairs while killing any intruders and feeding them to the imprisoned and starving kids. When the hero, Fool, is lost in their house, they spare no effort to try to find and kill him while abusing their abducted child Alice. When Alice discovers the truth and rejects Mommy as her mother, Mommy tries to kill her, screaming at her to burn in hell.