I'm not English speaker so please excuse my mistakes. I'm not sure I remember correctly since i read it long ago using google translate from a blog (Japanese - i think it was tumblr or like that but i forget the link). I think it was a webnovel the blogger wrote. The novel was about MC who was of working age, she got isekai'd by a car/truck/van, then she possessed the body of a young girl who just accidentally died, that girl was a maid in a rich house of a Duke(?). In that house, the master had 3 wives, each of them had 1 daughter (those 3 girls were close in ages). The 1st wife was dead while the 2nd was bedridden, so the 3rd madam got all the authority as the lady of the house, and the Duke was a workaholic who didn't really care about his family. The daughter of the 3rd wife was spoiled rotten by her mother while the 1st and 2nd daughters were treated badly because they didn't have their mothers backing them. The 2nd was a kind hearted and innocent blablabla so after growing up she got 3-4 handsome rich guys loved her and later happily marrying another richer guy. The 3rd girl was spoiled, selfish and brazen, she bullied servants and her sisters and did horrible things to the 2nd sister to get attention of a man (one of the 2nd girl's guys). She later was punished, stripped off her title and sent to her mother's grandparents' church/monastery. The 1st daughter was killed by the 3rd wife when she was 14 because the Duke was thinking of making her his heiress since she was excellent and talented. MC was personal maid of the 1st daughter, she knew the girl was a hard working, diligent and lovely child, she had been together with the girl ever since the mother was still alive, MC thought of the girl as her sister, thus, when she died, MC was upset and mad because she couldn't do anything to help the girl, she retired from working as a maid and went back to the home of the original owner of the body, on the way home, she tripped and died, then she woke up, she realized she had been reincarnated as the 1st daughter of the Duke whom she used to serve. I stopped reading here and totally forgot about it, now i want to read it again to know the end. If anyone know, please help! (or just give me spoilers is enough). Thank you in advance.