Yeah that's fine, and you're right a lot of games in the genre fall into the incest plot. Some devs give the option to pass, which works if you don't mind spending so much precious game time with non-LI's... if that was me i wouldn't want to either, it's like half the build!
What i got PO'd about is (if they did even a bare minimum of research) they choose to play a game they were going to hate anyway according to their comment. Overall I think the dev is doing a brilliant job in every aspect - but those are all aspects i look for & enjoy. If i find myself playing something labeled 'elderly-beastiality' I wouldn't bother posting how miserable i was the whole time... i'm going to bounce, go puke, then smarten up