After Reincarnating as the Heroine of an Angsty Romance

Qin Ning transmigrated into a novel as its heroine. Before she could even celebrate, she realized she had landed in an old-fashioned, toxic romance. In the original story, the male lead was a philandering scumbag with no morals, surrounded by mistress after mistress, while the heroine was routinely beaten by him and by his mistresses. If she has to marry someone anyway, why not marry the male lead's uncle and become the scumbag's elder?