Everyone can have their own opinions on a game, but this attitude bothers me enormously, it's a sneaky attempt to force the author's hand, a real blackmail, unfortunately the authors often fall for it, I hope that sooner or later they start to answer "if you think so you can not even play, goodbye".
You are making a judgment on a simple hypothesis, so without knowing if it will happen or not, but not only that, even if it turns out that erynn was, or is, a prostitute, wouldn't it be worth listening to the whole story? What does it mean it's MC's childhood love? So all the girls who have been somebody's childhood love can't prostitute themselves? If it were true, prostitution would not exist.
Or maybe you're just afraid that NYX will show some Erynn sex scenes with other people? Little spoiler, erynn was engaged to ethann, if she doesn't turn out he's gay, I'd say she filled every hole well, or do you think the girls in this game are all virgins? Perhaps the MC's mother is also a virgin, I would say that the MC is a child of the holy spirit.
I am always struck by how scandalized people are in front of such things, but no one talks about games where fathers fuck son, brothers fuck sisters, mothers are raped by their children during the night. It's amazing how people understand that "it's just a game" in the face of these things, but they can't when it comes to seeing a female character having sex with someone other than MC.
Oh yeah, just to clarify, I don't have any particular fetishes, NTRs or anything like that, I just can't stand when authors are blackmailed. This usually leads to the game becoming really shit. Play, if you like it continue to play, if possible support the author on patreon, if you don't like it stop playing and look for more.