An Eldritch Bloodline in A Mother Son Story

[SS100]

I was actually thinking of writing a mother son story with some super natural elements ala Lovecraft.

I was hoping this use this as a template or an idea:

https://imgur.com/a/7xFhZ

Basically a bloodline or some magic that gives the people who read it some insanity i.e. incest. However the powers are kind of worth it. In this regards I'm interested in maybe writing it.

But I do like the brainstorming of the matter. Overall I do want to just do something with the following ideas:

1. Porn with Plot so more than 10,000 words at least
2. The mother and son don't get too insane but likewise don't get too many powers
3. There's worse people out there than them
4. Show that there's magic at work
5. And that the bloodline from the "Dark Gods" is kind of cursed

With the imgur link I'e provided how would you write a story?

 

[TransactionNotAllowed]

I'm not currently a writer so I've no idea how to put it into a narrative. But it IS a pretty good idea. Combines two of my favorite things, lovecraftian horror and porn.

 

[SS100]

I'm not currently a writer so I've no idea how to put it into a narrative. But it IS a pretty good idea. Combines two of my favorite things, lovecraftian horror and porn.

How would you show the above effects together if a mother and son start to have sex?