You are really lucky...if stupidity would hurt you would scream now...
1. A mod is a modification of a game or its elements. A standalone game is just spin-off, not a mod and the only ones who had problems with it were the rule7 fetishists here and the fucked up patreon staff, but their bullshit is out of question, we dont need incest patches here because they have people with working brains...
2. Where do you think Lain got the models, backrounds and everything else that made said game look like ecchi sensei? Little hint, BlueCat had them on his PC...additional hint, BlueCat never complained...thats just you.
3. I dont see said game here...you? I also dont see in on Lains ss, patreon or anything else, so she never had it for sale, wich breaks another of your surreal assertion.
4. The whole "all used pixels are over 18" concept is pure idiocy. We are talking about games, arts, pixel, fantasy, ideas... not about humans. But even if we would talk about humans, most countrys agreed to legal sex with 14, so 15 is no problem at all.
5. Same goes for incest and everything else. If there is no real human, there is nothing to censor or ban but an idea, art and creativity...if i remember correctly all 3 were protected by law and human rights...so tell me what laws you are refering to.