Incest (Latin incestus — "criminal, sinful"), or incest, is a sexual relationship between close blood relatives (parents and children, brothers and sisters). The legal definition explains this as a penetrating sexual act between half-relatives.
Or simply find a game that fits your personal interests. After all, devs see what the Patreon vote for. You suggested your opinion, devs take it in consideration. Join their channel and vote for what you'd like to see in the next update. Free content is for you to see, you want something that doesn't offend you pay to change it. There's plenty of free games. I'm also opposed to NTR, not my thing, but i don't pay to change it. Most I'll do is report issues. Not tell the devs what to do when i dont support their channel to continue the game. So take whats given to you for free and stfu. Dont like it? support for a change or Find something else.