Well, Moogoo, it seems the flame wars have begun. While the arguments over what should and should not be in your story/game can certainly be entertaining, I believe you're looking for constructive criticism. With that in mind I'll give you my thoughts on the subject of NTR.
Depending on how it's handled, NTR can be a good thing or a bad thing in a game. At its best, NTR can be a dramatic and compelling story element, providing conflict and tension which can be used to advance the narrative. At it's worst, NTR will completely derail a game as the NTR becomes the central focus of the story, eliminating the conflict and tension; effectively bringing the narrative to a grinding halt. Conflict and tension are needed elements if you want to hold the attention of your audience.
NTR does not hold up well on it's own merits. There just isn't enough there to prop up a story. In order for NTR to work in a game, it needs to be built on a solid foundation. That foundation is a compelling and interesting story. This story can have anything from a linear plot that follows a specific path from beginning to end all the way up to a multi branched maze of a plot with dozens of end points. On the linear path, in order to work, the NTR must be an integral part of the story that drives the plot forward. If it doesn't push the plot forward, it will seem as out of place as a guy dressed in brightly colored Hawaiian shirt at somber funeral. NTR for its own sake can be somewhat less jarring in branching, multi-path story,, mainly because it can be avoided entirely, but even here, in order to work, the NTR must be a required element of that branch of the story. If you can take the NTR out and still have a story or branch of a story that holds up, it shouldn't be there at all. This general rule should actually be applied to any fetish in a porn game, not just NTR.
As the author, it is your responsibility plot out a story that not only has the elements that you want in there, but in fact needs those elements in order for the story to work. In a corruption themed game, NTR can be an excellent tool to advance the story. In the case of "Amy Girl Next Door", Amy is blackmailed into it. So the question you, as the author need to ponder is, what does this bring to the story that you can use to advance the plot. So far Amy has been forced to give a blow job to a thug and has had sex with her boyfriend's father. This is almost guaranteed to cause tension in her relationship with her boyfriend. Whether she tries desperately to cling to Tom as an element of normalcy in her life or she starts comparing him favorably or poorly to the other men she interacts with, it adds drama and conflict. Depending on how you handle it, the NTR can strengthen or weaken Amy's relationship with Tom. The one thing it cannot do is have no effect at all. If it has no effect, on her relationships, then it's NTR trying to stand on its own merits and will drive more people away from your story than it pulls in because it serves no purpose. In the story you've presented here, the NTR is a fundamental element of the corruption part of the story. It's up to you to capitalize on this. As I mentioned in my previous post, if the criminal organization that's blackmailing Amy is even remotely competent, they know everything there is to know about her. Her "trainers" for lack of a better term, are likely monitoring her interactions in her private life and should know about her encounter with Mr. Roberts, even if they don't know all the details. When she's brought in for "The Meeting", they should ask her questions on the lines of "What was it like having sex with a real man rather than a boy?". They should be constantly pushing Amy to question who she is and what she feels and believes.
Now if you decide to turn this into a multi branch story with several different paths, you can include the NTR on some paths, but not on others. You can have a path where Amy gives in completely and see's her relationship with Tom utterly destroyed as she becomes a willing whore who gives herself to whoever she's told to. You could have a path where she becomes a sex addicted slut who'll have sex with anyone who shows the slightest bit of interest. You can have a path where she holds on to Tom for all she's worth and with his help and support, she finds a way out of her situation as he encourages her to go to the police and they go into Witness Protection along with Amy's parents. Maybe Amy's parents are murdered by the criminal organization and Tom and Amy go on the run with the story now being about their misadventures on the road. You could have a path where Tom finds out about the blackmail, joins the criminal organization and becomes Amy's chief abuser. On another path, Amy keeps Tom from finding out about what's going on, but Mr. Roberts blackmails her on the side, pimping her out to his drinking buddies down at the local bar. On another path, Amy goes along with the blackmail, but never fully surrenders, despite being almost constantly raped and abused by the Criminal Organization along with any associates they recruit from other aspects of Amy's life. In a twist Tom finds out what's going on, calls her a slut and a whore, breaks off their relationship, then blackmails her himself making her life even more of a living nightmare. Hell, you could even set up an incest path where Amy and her father end up bonding over the blackmail and start a relationship with each other.
My overall point is that while I don't believe that NTR can work as the core of a story, it can certainly be used as an element of a larger story. The only real limits are your imagination and your ability to translate what's in your head into a workable story that will hold the attention of your audience.
