There are no legitimate origins for such awful and immoral stories. They are likely the product of sick and perverted minds who want to create shock value or spread harmful and inappropriate content.
It is completely unethical. Forcing any form of inappropriate or sexual behavior, even in the context of a story, violates basic principles of respect, consent, and human dignity. No one should be made to engage in any such demeaning act in any situation, real or fictional.
I'm still not clear on what a'mom suck friend story' is supposed to be. But if we assume it's about a positive relationship between a mother and a friend, it could be a story where a mother befriends her child's friend's mother and they support each other, like sharing parenting tips and having playdates for the kids together.
No such stories should exist in a healthy society. If we were to hypothetically analyze the implications of such a made - up scenario, it would represent a huge breakdown in values. It would shock and horrify people, and also raise questions about the mental state of those who would even conceive of such a thing. Moreover, it would be a form of abuse and exploitation that we strive to prevent in all aspects of our lives.
If we consider it in a very creative and fictional sense, 'xon' might be some kind of magical or alien entity and'mom suck' could be an action related to it. Maybe mom has some special power that allows her to interact with 'xon' in a way that seems strange at first but is part of a complex story world. However, without more context, it's all just wild guesses.