No, it is not clear and has never been clear. There are plenty of games out there with incest in them and also with Patreon support. How they do it? I don't know, but, this goes on and on, year after year. I suspect someone at Patreon is getting a kickback to turn a blind eye, or something. These are adult games, emphasis on "ADULT", we don't need to have our hand held as we play these games, treated like children. This is just art, not real life. In reality, nothing should be banned in art. The tags should warn you what is in the game and if it isn't your cup of tea then you just bypass it and move on.
No real-life actors or animals are affected in the making of these games, for goodness sakes!!!
So, even though in the OP it talks about corrupting your mom, there really isn't a mom now. (incest tag removed). So if that is the case, why did the dev move away from Patreon, if he caved to their demands anyway? I'm going to play some of this new game, but, I'm pretty sure I won't be sticking with it. Curse you Patreon, another one bites the dust!!!!
Maybe, some kind heart out there can come up with a mod or patch?
I just started playing the game and it turns out a patch or mod isn't necessary. The incest is still in the game. Anyway, he still calls her mom and refers to her as mom. So, I guess we're good. I just hope the puzzles and dungeons aren't too difficult.