Thank you for this. Your post is one of the best written that I have seen about incest and the realities of it. It certainly answers quite a few of the questions that we often see asks on this forum.
However, I have to point out to other readers that this is your experience, and the experiences of other people can be very different.
One of the really interesting aspects of your account is that your mum and (I presume) her brother have also been in an incestuous relationship, but you haven't stated how long this has continued. Were they incestuously involved during their adolescence? The only star after her marriage ended? And I can't remember reading the reason why your mum lives on her own. Is she went out, or divorced?
This leads me to wonder another thing: were you born with a predilection towards incest? I have read quite a lot about genetics, purely from an interest point of view, I'm not any kind of scientist. One of the things that I read a couple of years ago was that genetic experts now believe her person's sexuality is part of their genetic inheritance. My mum is bisexual, and I have always known I'm bisexual, right from when I was a little girl. It makes me wonder whether someone who enjoys incest does so because it is part of their sexuality? Did you and your sister inherit a predilection towards incest from your mum? I certainly don't know the answer, but is an interesting question.
As to where incest relationships go, your own feelings are that it will continue for as long as you feel comfortable with it. But you seem to think that once you and your sister are married, that's the end of story. This is not necessarily so for everybody
I receive a fair number of private messages and emails from people wishing to discuss incest. I guess they see my responses to questions on this forum, and the question I raised recently, and realise that I have a sympathetic view of such relationships. Why have to dismiss quite a number of the posts and emails I receive as nothing more than fantasies, there are still a number of correspondence who I find quite credible. As well as this, I am acquainted with several incestuous couples, and to families where multiple incestuous relationships carrying on.Two of the couples that I know, and who are friends of mine (though they don't know each other) brothers and sisters who live together as if they were married. One of those couples does so in the full knowledge of their parents, while the other couple ran away from to live together. One couple has two beautiful and perfectly normal daughters, while the other couple recently had a baby boy, and he is also perfectly normal, as far as can be taught. So, while robot boy seems to think that his relationship with his sister will end when he gets married, or when she gets married, this does not necessarily have to be the situation. I don't know how big a family he and his sister come from, but certainly his mother not only knows of their relationship, but is actively involved with both of them, as is her brother. He and his sister could live together as man and wife, and nobody outside his most intimate circle would know any different. The longer their relationship went on, the safer it would actually become. It is a sad fact that our older relatives die over course of our own lifetimes, and in most cases, by the time we reach our middle age, our older relatives are either dead already, or probably too old to be bothered what we are doing. Robot boy hasn't mentioned any other brothers or sisters, so there are few people, as far as we can tell, would even be affected by their relationship with each other, or with their mum. It's easy to imagine that if they moved to another city, they could set up home together as husband and wife, and it's quite natural from mum to live with her son or daughter. But that surely is up to them, and maybe all of them only see incest is a very pleasant but finite interlude before settling down to marriage. On the other hand, robot boy admits that he finds the love that he has his sister and his arm are much more intense and he might have imagined when he first started incestuous relations with. One has to wonder whether his sister and his mum feel the same way? If they do, then it doesn't really make sense for any of them to marry other people, when the real happiness would be to stay together.
I daresay robot boys post may cause some more outrage, or at least some adverse comment. Personally, I applaud him for having the courage to speak openly about his relationship with his mum and his sister. This isn't the usual prurient tile of sleazy sexual evolutions, merely some straightforward statements of how incest affects him and his family, and how they all feel about it. Most people know that I'm not really bothered about people's morals. Each of us has to decide what is right for us, and live with the consequences of our actions, if indeed there are any consequences. I always say if the things you do in life cause no harm to others, and there's no reason why you shouldn't enjoy them. As robot boy, his mum, and his sister, are doing no harm, and they are all happy together, who are we to judge?
I for one wish them a happy and loving relationship together.