Two Wicked Stepmothers Transmigrate into a Book and Marry Father and Son, but Both Want a Divorce

[Set in the 1950s + both transmigrate into a book + marriage first, love later] Si Mo spent ten years battling her wicked stepmother. At the woman’s birthday banquet, the two got into a vicious fight and both fell from a cruise ship to their deaths at sea. When Si Mo opens her eyes again, she is at a wedding procession, and she is the bride. Once she pieces together her memories, she realizes she has transmigrated into a book set in 1955.