https://www.novelupdates.com/series/i-became-the-stepmother-of-my-ex-husband/

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Lin Wei Xi found out after she died that she was just a cannon fodder in a novel, used as contrast to the gentle and considerate and virtuous female lead.

The male lead was her ex-husband, the dignified heir of Yan Wang, his family were superior and brilliant, but the heroine was not her.

The female lead was her concubine-born younger sister, and her husband's white moonlight, his cinnabar mole, no wonder! After Lin Wei Xi died, her husband finally married her sister as he wished.

She watched coldly at the two like honey in the oil, in love and harmonious, everyone using the success of her younger sister to contrast the impropriety of the original wife.

Lin Wei Xi sneered, okay, since your love moves the world, then this sister will come back and be your stepmother!

So she married her ex-husband's father, the father-in-law she never met in the previous life, the country's God of war, who has not remarried after losing his wife, the one that hold military power, the brilliant Yan Wang.

Later Yan Wang, who was in his prime years and used to act decisively, looked at his small, delicate, much younger wife, and had a headache.

No matter, she is still young, he have to spoil her, indulge her, teach her.