Hm seems you mean like it happen in Corruption.In each level of corruption you get new diferrent handjob,blowjob,sex etc and the girl change her dress too.The problem is you losing the old content.
Nope, even simpler. Just different text descriptions with each image, every time you run across that same image. Every blowjob, for example could have descriptions of throating, drooling, licking, kissing in various different ways instead of the same text every time you see it.
The image doesn't have to be different each time, but the text does. Goblinboy used to do this for his AIF games, for example, by mixing up various randomized lewd descriptions as you repeated actions.
It's just text, it shouldn't be impossibly hard. Yet no game changes the narrative of a repeated scene as far as I can tell.
I don't mean to pick on Au-Pair for this, it's so rare any more that it must be an engine limitation-- maybe each scene is 'bound' to its narrative and you have to duplicate the actual images themselves-- with their text boxes-- to get some variety, and that would make the game huge.
TL;DR: It's not progression or corruption, just straight-up variety.
