Main character is the stepmother of her “husband”’s four children. Her parents sold her off to the husband so she became the stepmother at young age like 12 years old something and she grew up ignored her children till around 26 yrs old but she went back in time as 16 years old. It’s really good. I’m sorry if it’s kinda spoilers but it’s like beginning chapters anyways.
its abt reincarnation, she wasnt a good stepmother but not bcus she abused them or anything but shes like only two years older than the eldest son so yeah they werent exactly on good terms, then she wanted to go to the eldest son's wedding ceremony but some very bad things happen and she reincarnated, its good like 100% recommend it

i just finished reading a stepmother märchen lates chapter, so reading this really helps in cheering me up after that heartwrenching chapter