Uragirareta Reijou no Kanpekina Fukushuu Keikaku

Tender-hearted Jerenia is married to the most uncaring and disrespectful husband, Vincent Mercier. Her in-laws undermine and abuse her daily, but Jerenia believes that if she bears a child, she could be respected as part of the dukedom. After trying for seven years, she finally conceives a child, only to find out that Vincent's been cheating on her with her childhood friend, Erica. Vincent conspires to kill his wife, but surviving the murder attempt has turned Jerenia into a woman of vengeance. (Source: POCKETCOMICS) Note: First released in English, with the initial eligible release in Japanese followed by Korean, making it a manga by our standards.