Surprised to come across such an enjoyable manhwa after such a long time which is yet to be ruined by poor translations but I can't get over the fact that if her grandmother is so powerful, and only taking her name is enough so that no one would mess with the MC, then how could her stepmother and stepsister even dare, let alone get away, with making her life miserable for so long?? And it's not like she wasn't in touch with her grandmother either.