My advice as a avid female protagonist enjoyer (played almost everyone on the site except some japanese ones)
If you want the game to stand out add some dynamic with the relationships, and avoid turning the mother into a mattress that gets done by every ugly bastard in the vicinity.
0)Most importantly, dont bring in too many characters, more scenes/development with a handful of characters is better than half a blowjob with a hundred
1)Dynamic relationship with the sons with one being hot for the mom while the other one has to be seduced
2)Sister or the daughter being the corrupting influence who dominates her to fulfill her own fantasies including incest and more
4)Make pregnancy an in game mechanic not game over or ending
5)Sons friend or bully whom the mom strongly dislikes/hates but has sex with for personal gain not because of blackmail to show her agency
6)Femme Fatale path where the mc uses sex, corruption and manipulation to achieve a position of power and or wealth
File Structure and hierarchy of the game looks great, very clean and solid, good foundation for long development and expansion.
Might want to move scripts into a subfolder structure too like images and add a debug feature.
Bonus) "Forced"/unable to resist mechanic, for example the MC can acquire a trait "likes big dick", scene with e.g. her daughters boyfriend who has a big dick, if MC does not have the trait she can resist the temptation, if she has the trait the option to resist is greyed out thus forcing the player