This must be like the most stupid plot twist ever seen or made in incest comics, stories or whatever. I mean, this type of stories should absolutely be based on secret, taboo, tension, moralism, hypocrisy, society rules and whatnot... This, even if in real life would be clearly a very modern, advanced way of addressing the issue, is just not working in porn fantasy artwork, because it kind of kills excitement , that feeling of prohibited and so on. I mean, artists should just think of "what kind of situation makes things exciting to read" and when we talk about "incest fantasy", there are some milestones that should be always used, just changing characters, how they look, or environment. Again, key words in "family/taboo" category should be unthinkable-unacceptable-prohibited-secret.