Avalon by Lockheart, may be something you are looking for. But I warn you up front, that story may put you out, and into the real world more than you may be ready for. But again, I do not know you, your age, or any of Your background, but since you have found this site, and this novel by Lockheart, you have some lust and pleasure to seek out. I can write about Avalon, but what about you check out my comment there, and you get some more information about what I mean.
Next for me is your turned off statement, and I totally understand those feelings, and the written form of it, that again not put you into the lewd area. I am and adult man, with children and lived one life with my ex wife. In the story telling, by the artist, every character in his games are of 18+ age! With that, and the mindset, means they're can, and should take their own decision, baste on their perspective.
The word incest, is somewhat twisted in terms of what it means to you, to me, to maybe a different meaning to everyone. The big difference goes to what your society put people into classes, boxes, and thereafter force down a set of rules, regulations, bans, do and do-not, this list goes on so I stop here. Where I am raised, come from, and live, the words meaning are abuse of children under 18, 16 years old, and the absolute majority are without the ability or power to stop it from happening, bye the youngest involved.
I am a little thoughtful about if I shall post this or not, but I decide to do so.
Lockheart and his novel, present some of the most family secrets that are silenced, by the family, and sometimes part of the public community. That «treatment» destroys good peoples, and too many times let real bad ones go free, due to unbelievable causes. Too much money, community power are some of those.
Enough from me, I recommend Avalon, by I have to ware you, you may be hooked on the art from Lockheart, as I am now.