Urm. That wasn't true. I been following BB since 0.2. After the whole fiesta with Eric , by 0.5-.0.7 you can practically threaten Eric to stop on your family (except Ann) , neuter him , or get rid of him in 2 ways if I rem it correctly. I stop playing after 0.6 ( I have my own personal opinion of what happen to a game when supporters start to dictate what the developer can do and should do)
Anyway DS have no problem separating NTR from incest. What he has problem with is ppl forcing him/her to romance the family. DS believe that romance among blood relatives is not possible. And I do respect that coz in reality that is near impossible. Anyone with family should know that. But porn world is another matter =D
I believe he intend for a darker route like N/C , blackmail trickery and stuff. And ppl go crazy when they realise there is no romance route for Ann and Lisa particularly.
Even without Eric the game went on until version 13(no new Eric content even though getting rid of Eric is optional) . So the idea that DS cannot separate NTR and incest is very wrong.
DS had been active on the BB thread for a while before the toxic f95 community overwhelm him. You can check out the last few post he have before he left on the directions he intended and the "hurdle"(romance) that alot of ppl want but he himself don't believe in.
https://f95zone.to/threads/big-brother-v0-13-0-007-dark-silver.1519/post-355353
https://f95zone.to/threads/big-brother-v0-13-0-007-dark-silver.1519/post-349885
https://f95zone.to/threads/big-brother-v0-13-0-007-dark-silver.1519/post-361673 ( this in particular is a blatant admission)