I won't say anything to you about make it skipable,make it optional or something,
I would just ask one question why?
You implement that in your story,it's important plot,will happen even if it's skipped what is the point of playing a avn of harem,where there is clear NTR? It isn't bad and many cucks will love it,but why do you have to destroy your whole avn? Just create a NTR avn for cuck audience or you are yourself a cuck?
People could be involved with others in past , you can't change it,you can't reverse that and be yourself before,but what you could do is never bring that thing up,leave your past relationships or fling in past but you have to make that important part of story.
You destroyed a great avn with just a single scene great achievement buddy,keep it up