A sex machine fanfic is a type of fan - created fictional work that involves the concept of a sex machine in some way. It often belongs to the realm of adult or erotic fanfiction, which is not suitable for all audiences.
Most likely, sex machine stories are fictional. In our normal society, the concept of sex machines is not a common or publicly accepted real - life scenario. It often belongs to the realm of science - fiction or some very specific, often inappropriate, fictional creations.
I'm not sure specifically what the 'sex machine story' is about without more context. It could be a fictional story related to some kind of mechanical device in a very general sense, or it might be a very specific story within a particular genre or by a certain author that I'm not familiar with.
No. Such stories involving sexual content about a teen are completely inappropriate and unethical. It can also be considered a form of child exploitation, which is unacceptable in society.
Our society promotes positive values such as respect, love, and healthy relationships, which are completely different from this kind of improper concept.
Mostly, yes. Since sisters are usually seen as having an equal and loving relationship in society, the concept of a femdom relationship in stories about them is quite a departure from this norm. It can stir up debates about ethics, family values, and the appropriate boundaries in relationships. Additionally, it might be considered offensive to some who uphold traditional family ideals and the idea of sisterly affection.
One type of femdom story could involve a female dominant in a BDSM - related scenario. For example, she might be the one in charge of setting the rules for their playtime. She could decide on the types of restraints or activities that her partner would engage in, all within the boundaries of safe, sane, and consensual practices. It's all about power exchange and mutual respect in these stories.