Eh.. I don't try to think about real life bullshit regarding this topic, it's a fantasy. And I think it makes a lot of sense since MC grew up without mother that he would not mind making sure Nicole's kid doesn't grow up without father.
We can play for the fantasy or in the way we would never act IRL. Or we can roleplay it a lot and hard. But usually players have their favourite or preferable paths / LIs among all available, so the rest are played for the completeonist purposes, to see and get more content and just of curiosity and learning different parts of the story, since all those little puzzle pieces are distributed across all paths and branches.
Let's be honest, our preferences in game are usually reflects our preferences IRL. As well as most of our choices in game, how we see and feel about each girl and what we think about them. As well as the course of our thoughts, assessment of the characters behaviors and the prospects of the relationships, among others.
Regarding Nicole and similar situations... MC grew up w/o mother, but he never got a stepmother too. MC will never become her kid father, because the kid have a real one already. This kid is 10yo btw - just 9 years difference. After a few years kid will understand a lot and in 8 years will graduate from high school and will be in college like MC at the current moment of time.
They say that because they've never had a relationship with a divorced woman. It's not just because she gave birth to someone else, which would be pretty humiliating, but because her ex-husband will always be a part of her life, just because he's dad of her kid. She can just dump you and leave, saying that the kid should be with his dad. You're just nobody, man. Not to mention, Nicole is a stripper and her job involves doing special things for her clients. As we saw in Ep3, when she gave Tremolo a BJ. Maybe next year, she'll also give another cute guy a blowie?
Well, someone likes to play as a cuckold. While the anti-NTR army trying to demolite and erase such content from the genre. To please every possible kinks and deviations authors has to put into the games such a future "wife material" like Riona, Nicole, etc, while not forgetting to mean and let us know what they are doing and up to. The minimum req is not to show a girl in action with another dude. So the next rule after "The father is the one, who raised" - "I didn't see it, so it never happened."
