Did you not play the game? You only have the option to have sex with her AFTER she told you. And she literally said it when she was first introduced. Not to mention the fact you can refuse to have sex with her and either way, sex or no sex, MC offers to help her find a real job.
So it's not disgusting that you "were forced and didn't know" because you had an option and knew all along. I'm guessing you didn't read shit and skipped until you got a sex scene, and only found out she was a prostitute by seeing her walk out of that hotel with that guy.
(Personal Assertions ↓)
Perhaps stop being a gooner for a couple of hours, read the story, get to know the characters, and maybe, JUST MAYBE you would know if a character is a prostitute or not.
Also, saying you were forced is not only irresponsible but disgusting behavior. You had a choice Acknowledge that and the fact you're a helpless gooner. Get over it. Watch your soulless Step Ladder porn.