
57-58 is the same chapter, 59-60 is the same chapter please correct it.

*You can read chapters 50 & 58 here.*
https://kunmanga.com/manga/im-a-worthless-stepmother-but-i-love-my-family-madly/chapter-50/
In all the sites that 60 was available, it was repeated so I'm guessing the current English translation is updated till 59.
Also you can reread some chapters. I'm not sure if it was 56 and 57 that have missing pages.
Spoiler
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.They were childhood friends, before the marriage he treated her as if he waiting teir union, but at the first night he treat her as a prostitute humiliate her etc. He literally say she can have as many man as she want. He is a fuck boy who openly cheating after the marriage, treat MC as a trash, he only care at his pleasure and a treat her as baby making mashine and a doll to fuck. He is just disgusting. And guess what and he having a face to be surprised when MC tell him how she is treated in the high society....."I just didn't want to lose you, I didn't want to lose to my brother" ....hell no. MC had enough and now she using him as a baby making mashine and a dildo/it wont last long/ . Then she forgive her rather soon and live happily after all.....