Yes, it was established early on that those were the rules, but that was a "contract" between MC (the player) and Laura. A contract can be altered if all involved parties agree to it, which is what would be the case here.
Honestly, in my mind, this would be something the MC would explicitly bring up to Laura. That's the whole point, it would be an option just like the dom/sub, the condom stuff, anal, etc. It would be the player as the MC saying, "Hey, I think X is hot, it's okay if the game starts showing me X" or "No, I don't like X, please don't show me X.".
I really just don't see how it's any different except people get nervous because they *personally* view it as being too close to NTR (even though it isn't NTR by any stretch since it's done with consent, and could theoretically be canceled at any moment by MC).