Reincarnated as A Villainess

Reincarnated as a stepmother of Cinderella, the mc thought that it wasn't fair that she got reincarnated as a 37 yo mother of two (and Ashley, a.k.a Cinderella) but Mildred, the mc decided to take care of her three daughters until they are married

I love this manhwa but the translation is terrible.

About a villainous princess, the sole heir of the empire who has many concubines. Mc is reincarnated as the princess, and to survive zhe must eliminate the heroine of the game, who isn't as kind and pure as everyone thought
novel link : https://www.novelupdates.com/series/it-seems-like-i-fell-into-a-reverse-harem-game/

This one currently has only 1 chapter but it's interesting, novel link : https://www.novelupdates.com/series/otome-game-rokkushuume-automode-ga-kiremashita/