This kind of theme is quite controversial and inappropriate. Stories with such extreme and vulgar content often have negative impacts on society and moral values.
Such stories are not appropriate. They cross the line of propriety and can make people uncomfortable. Family relationships are based on love, respect, and appropriate boundaries, and this kind of story goes against those principles.
There are many great family - centered stories in children's literature that promote positive values rather than the inappropriate content you mentioned.
There was a time when the son came home from school and saw the mom's pussy cat sleeping in the sun. He gently stroked it to wake it up and then played with it using a cat toy. The cat pounced on the toy and they had a great time together. It was a really cute moment that showed the bond between the boy and the cat.
There are many other great stories to tell, such as heartwarming family moments, acts of kindness, or inspiring personal achievements that are much more worthy of sharing.
Stories about a mother's selfless love for her children are great replacements. For example, a mother who works multiple jobs to provide for her kids' education and still finds time to be there for them at every important moment in their lives.