
SPOILER-
No dear, it's just that the cardinal Rovesche was a pedophile. He became obsessed with Shuli from the moment he first saw her at her wedding. Because of his unhealthy obsession in the first timeline, he decided she must have placed witchcraft on him due to her nickname as a seductress during that life. In the current life he was also obsessed but this time he tried chaining her up instead. He conspired with Jeremey's fiance's father (duke{?}) to brutally cut her body into pieces when she was on her way to sneak a peek at Jeremy's wedding. The kids found out during the ceremony in the first lifetime that she was dead when Nora, the emperor, and the Duke of N-something walked in to inform them.
She really truly has NO relation with the first empress.

well the novel is german(?) so I have a huge spoiler thread for you https://forum.novelupdates.com/threads/a-stepmothers-m%C3%A4rchen.90525/

Sorry, I only have the link to spoilers, I believe the novel is in german or something so here the spoiler thread link- https://forum.novelupdates.com/threads/a-stepmothers-m%C3%A4rchen.90525/ . It's practically a novel because the people were nice enough to literally type out the chapters.
Some people want to kill Shuli, because she is somewhat related with the Empress? I am really curious and I want to find out more!!! Nice job to the translators, the illustrator, and the author. One of the best Manhwas I've read.