There's already a semblance of incest. The first scene in 0.06a
Just to be sure: Spoiler alert (Content, not story)
I'm not the dev, but as for of the 0.07b, you can avoid the H-scenes you don't like but they still take place in the story. Lesbian is mentioned in story, but not in any scene except in form of threesom. No NTR, rarely femdom (and light one, usually latest very little a character being like that).