Astro's links ideas also inspired me something that could be fun. A demon might notice Akane special tastes and try to find a way to use them for his fun. Then the demon would then try to link Akane body to some other woman. For example he could make a deal with this other woman and offer her powers or something else if in exchange see accept to be linked to Akane. The demon would describe the link in a way that would make the woman think that the effect of the link would be to feel in her pussy what Akane feel in her own. As the demon would offer her something really interesting in exchange, she would accept the deal. And then would discover the real nature of the link: not only the feeling but everything that happened to Akane sexual/reproductive system would also happen to her own. Like if Akane take out her womb to play with it, the linked woman would feel a spectral hand grab her womb and see it extracted from her and stroked. The demon would probably gave her just enough information so that she can run after Akane to prevent her to make a bigger mess with themselves.
I'm also imagining how it could be fitted in the current plot…
Scientist from chapter 3 (alone): “I must find an other of those pink fleshy things or my colleague will call me a fraud! I ready to do anything to save my reputation”.
Demon (materializing in a burst of dark smoke):”Anything? Did I heard anything? Because I can get you one of those if you help me in a little experience.”
The demon give her an exact but confusing explanation about the link he want to create.
S:”To summarize you would give me one of those thing if in exchange I accept to be linked with this Akane, which would result in feeling it each time she masturbate or get fucked.”
D:”Yes, that a quite short summary but a good one. I put this link, you get your fleshy thing.”
S:”Ok, deal.”
D:”Deal!” The demon start disappearing in the ground.
S:”Hey, aren't forgetting something?”
D:”Well I don't know what Akane is doing but don't worry you should get your pink sock really soon. If I were you I would check between my legs to see if it's not appearing here. MWAHAHAHAHA!”