To make it clearer.
There are prostitutes, your employees.
And there are two other girls, possible romance interests.
You're a pimp. You pimping the girls (courtesans), interacting with them, but falling in love is not the main thing...
Affection? Yes. As human beings working close together, you have to keep a relationship with your employees at an adequate level. But adding an NTR tag would make the same sense as adding it to any other brothel management game.
You can get more personal with the other two girls who have other purposes within the story than being whores if you miss the cuddling and handholding.
Game is all about managing the business, kicking ass, and getting your noddle stiff and wet.