I see...
I'm still quite early in the emily sub path, but I'll drop my 2 cents real quick regarding this direction for the NTR (not sure if dev is active in the thread though).
I am not saying there is some definite rule regarding NTR progression or set ups, but the dominant MC getting cucked (really NTRed and not just whoring out) is one of the worst ways to include NTR, in my opinion. There is just a stark discordance to the tone and player intention if you place the NTR route in the "corruption/domination" route.
The player is already in the mindset of the asshole MC training a live in sex slave who will to anything for his attention. This is a power fantasy. Whoring out bitches is fine for those who want that type of authority over the female, but when it actually turns into NTR from that point, it just doesn't align with what the game is selling up to that point.
I know why many devs opt to place the potential NTR stuff in the darker branches. People who like love/romance will generally want nothing to do with it. However, NTR kinda requires an intimate and loving relationship to be present before it gets stolen. From the NTR enjoyer's perspective, the route jives much better with the love route.
I like male domination, whether it be from male MC or NTR, but it's incredibly hard to mix the two in the same route. Only a few games managed to do this effectively (Seeds of Chaos, Rise of the Crime Lord).
If you give this game to me and ask to me fix the "issues" that I see in the pathing, I would do something like this. Add a NTR on/off switch. If it's on, you can get NTRed on the love route. Not because MC is actively wanting to get cucked, but because he underestimates the OnlyFans fuckers who will corrupt her secretly. For the emily sub route, things could progress more or less the same, but the tone of the "NTR" on this route should be more of whoring and using her to rise higher in society, rather than getting her stolen and being cucked.
That's just my opinion though. If it helps, that's great. If not, that's cool too. Good luck.