Trouble is you get to many variables then that also need to have some pay off. Add another year to the game.
Also it is already hard enough to do NTR believable in a game like this where players make choices from a male MC's perspective and keep a female character believable as an independent person with own life and motives. If all her reactions are purley based on MC's action.
I had that problem for example in a game with a boy that just met a succubus and basically that boy, who cared much about his independent mom that had taken care of both of them for 15 years, on his decision could pimp his mom out to her boss so he had a more comfortable bed. Basically destroying any illusion she was an adult independent woman with a brain or him a loving son.
I get why that dev did that from a game mechanics perspective so he could keep it avoidable if people wanted, the impact it had for me on game was kind of bad though.