I don't want to be mean, but instead adding even more characters, I would prefer more scenes with the current ones, specially based on the corruption increase levels (before their impregnation). The scenes are nice, but since there are so many characters at the moment, along with just 2-3 levels to each character, it makes it feel that their corruption is easier than it should be. Not to mention that the girls end up "not being special", the relationship with them feels "meh" due how many females are in game, along it loses the "lockdown" feel in the game.
Incest impregnation should be a taboo. While some characters do actually show "hatred" for the MC, their "growth" should be a bit more gradual, I find it odd that they don't like the MC at all, but with 2-3 scenes they completly fell in love with him and let him impregnate them. The only one I understand her corruption development is the little sister due her being innocent, but still wished more scenes with her, since she's the most likeable female in the game, at least for me. But that's just my personal taste of course.
Maybe if the new characters are aunts or cousins, I maaaay understand their introduction due relationship with other girls already in game, but still would feel a bit too much, specially if they were only introduced after the lockdown.
Still, thanks for the fun your game brings.