There are 5 categories of women:
A) Active brothel employees (several)
B) Contestants in a competition hosted/sponsored by the brothel. (3 women)
C) Partial owners of the brothel. (1, now 2 women)
D) Fuckable women unassociated with the brothel (currently 1 woman).
E) Your mom (non-incest game)
While you can fuck A, there's no relationship beyond "co-workers". You fuck B, and develop something akin to relationships if you choose, but currently nothing like "dating". Obviously A and B will be fucked by other men. You can date one of the C's, and you can fuck the other one (who is married). You can date D, but she starts the game with a BF, so you can cuck him (thus making you the NTR), and eventually steal her to become your GF, or you can let their relationship continue. Both GF options are optional as GF or just fuckbuddies (or no relationship at all). There are flashbacks with E being fucked by other men, but Daddy has never been in the picture.