we feel that a ret-con like that would come across as disingenuous and scummy. our long term fans will always know what these characters were originally designed to be, and we can't change that. the only people sated by this course of action would be those who don't mind it in the first place while making the rest uncomfortable.
In short, it's something we've considered, but not something we will do. we've built the game on a bad premise and we are just going to have to live with that, but we are determined to fix our error as much as we can and finish this game despite its flaws.
If that ruins our game for you, you can go find your content elsewhere, good riddance! at the end of the day, incest isn't something we feel comfortable covering. as creators, we've said "no", and no means no, please respect that.