One thing I confirmed for myself after reading the cheating reactions outlines is that I am not doing a harem in this game. Monogamy it is, across several playthroughs.
Harem fantasy requires a certain suspension of disbelief from me to make it plausible, and these characters are too life-like for it to ever be plausible. No way these people will just agree to be a part of a crowd like that instead of being special, that only works in a porn that doesn't take itself too seriously or doesn't try in the first place.
So, it's going to be several routes/playthtoughs. If devs ever wonder if monogamy content would actually have its target audience, here's your confirmation.