Because such stories are extremely inappropriate and violate basic moral and ethical norms. It involves abnormal and unacceptable behavior that is not suitable for public discussion or entertainment.
We should focus on positive and healthy family - related stories. For example, stories about a mother and son going on a nature hike together, sharing interesting conversations during the walk and learning about the environment. It promotes a healthy and positive mother - son relationship without any inappropriate elements.
A mom might have had some health issues and was advised by the doctor to eat more whole grains and lean proteins. So she started making oatmeal in the morning and grilled chicken for dinner. She gradually improved her health and inspired her kids to also make healthy food choices.
Another alternative could be girls' first encounter with a new culture when they travel or study abroad. These are much more positive and inspiring topics.
Using that expression is not proper. Here is a story of a loving mother. A mother always cooked her child's favorite meals. When the child had to move away for college, she sent care packages full of home - cooked goodies regularly. She would also write long letters with words of encouragement and love, which made the child feel that her love was always there no matter how far away.
In a civilized society, we uphold values such as respect, family harmony and propriety. 'Cum in step mom stories' clearly violate these values and thus have no place in literature.
There was a mom whose son was really into adventure stories. He would write them down in a little notebook. Every week, the mom would sit down and read through the new stories. She was amazed at how vividly he could describe the characters and the exciting situations. This simple act of reading the son's stories created a warm and positive family dynamic.