Just to drop my dime on the 'pacing vs. the open incest' ranting. The game goes pretty slow, i hugged every family member by day 1 or 2 and snatched kisses from all but 'big sis', who hands them out for free, because BS already had their taboo moment (which is not so uncommon in 'normal' families with siblings that a gender compatible) so this works well.
As for the 'Alpha male versus the underdog corruptor' You really want another of these i have to 'level up', 'grind' big sister down, 'open' up little sister('s pussy) and 'find' moms dirty secrets / leverage games?. Unless your game goes anal on resource / time management (Glassix, Superpowered) just establishing a good VN with some clear paths ahead is far more rewarding than the 'gather points', 'crack character decision-maze' garbage.
and lets not forget the 'Corruption Bottleneck' rant. Why does the corruption part ALWAYS need to be the main (70% of plot) story ark? Imagine a queer ero VN, were the main character had to convince every fucking potential partner to turn fag or dyke. I'd rather try and turn queer in real life. So surprise all characters have already crossed the rubicon and set up shop, no take backs but maybe some bipolar citizens to organize that romantic threesome with your best black buddy and your tomboy lady friend? Yes please!.
I am not saying the 'corruption tale' isn't worth telling but i heard it so often, starting this at phase two 'enjoy corrupted partners, yay', has some serious appeal. Because these stories need to be told, too. Yes how does living with your morally degraded partner actually work out? We could even throw some NTR in there which is not lobotomized masochism.
If i'd fuck my mom and sister, my ex-girlfriend doesn't magically shut up, that education / social ladder thing doesn't disappear and the entire slice of life / sope opera drama that is my job no matter how much 'bling-bling' it buys me or how high i climbed already doesn't walk on hold so i can micro manage my harem. What happens to my partners when i get to sleep? Do they also sleep thinking of me or are they dreaming of each other? If they jumped on the foursome bandwagon why not trying the slimmer threesome model while i am doing laundry? Whats wrong with 'post-corruption Slice-of-Life'?
TL DR, Why not start a game post corruption and go from there? I curse the story, the moment it ruined the game so hold your horses.