Reborn to Find the Partner Assigned to Me by the Underworld

In her previous life, her husband and younger sister betrayed her together. She did everything she could to help him ascend to the highest throne, only to see her entire maternal family slaughtered and her young son die a terrible death...

She herself died without a whole corpse. With her dying breath, she swore that they would never obtain anything they wished for!

Reborn in a new life, she is now a soul from another world. Do you know? I have returned once more!