Aaand... everybody wins! The mom wins, the daughter wins (as in her mom is safe), and the readers win, too (since it's no tear-jerker). Who says one can't please everyone? 😊
Sorry, but... why was that translated "Nikumi-chan"? The original work is in Chinese.
After a bit more digging: there is a post made by the creator at https://home.gamer.com.tw/creationDetail.php?sn=2282443; this is linked to on the Pixiv page linked to by Mangadex (Raw). It includes downloads for (among others) a Japanese version (psd), in which that line reads, "小娘が、身の程しらずめ!”. This pretty clearly indicates that "小憎“ is not the girl's name.