Rotting in the mud

Born as an alpha, Aoi has lived a life without knowing failure. She married Akio, also an alpha, in her twenties, has one daughter, and lives a smooth and perfect life. However, one day her daughter Ui tells her that her husband has been having an affair. Her husband's affair partner, Tomoe, is the mother of her daughter's classmate Eba, a poor single mother—and an omega—and was Aoi's "fated mate." (This is a story that takes place "after" such a plot summary. The narrator is Ai, Aoi's daughter.) ※Yuri omegaverse. Since this is a story that layers elements of choosing people on top of more elements of choosing people, please be sufficiently cautious of the keywords. ※Cross-posted on other submission sites.