What I'm expecting is something that relates to the incest not just sex, blackmail and coercion. The fact these folks are related has no bearing on the sex or the story....Well, maybe you are expecting from this game too much interpersonal feelings.
I simply see it as an porngame with related actors which are depraved and loose their inhibitions and will finally screw each other the whole time. That is what i expect. Yes i am a perverted lurker and i even would enjoy to see Kira or ann doing beastiality for a movie
I played a lot of games in this genre. I like DMD, SummertimeSaga, DoD. and some more. They all are different and good in their own kind. It doesn't matter to me, what content @DarkSilver will add in future, but i am looking forward to it, because it will be entertaining and he is doing a good job.
I only hope DS has a masterplan about coming content and won't drift away from it because of wishes form players. It's ok to listen to the fans but this should only affect minor matters. DS is the director of this game from beginning and should not give up his role.
They are just the women that are around. Sex with them is no more emotionally or sexually deviant than it is for someone not related.
The fact they are called FAMILY serves nothing but the Tags he is allowed to put up on Patreon to sell his BDSM Corruption game!