The trope of a female character claiming someone else's husband as her own is deliciously dramatic and pops up in all sorts of genres! One that immediately springs to mind is 'Rebecca' by Daphne du Maurier. The unnamed protagonist marries Maxim de Winter, but the ghost of his first wife, Rebecca, looms over everything—almost like she’s still claiming him from beyond the grave. The new wife feels like an intruder in Rebecca’s home, surrounded by her possessions, and even the housekeeper, Mrs. Danvers, treats Rebecca as the true mistress. It’s less about literal possession and more about psychological domination, but it’s utterly gripping.
Another wild example is 'Gone Girl' by Gillian Flynn. Amy’s twisted obsession with Nick takes on a terrifying 'mine forever' vibe, especially when she fabricates an elaborate ruse to frame him—only to reclaim him later in the most messed-up way possible. It’s less 'claiming' and more 'psychologically annihilating anyone who gets in her way,' but the intensity of her ownership over Nick is undeniable. If you want a book where a woman refuses to let go, even when logic says she should, this one’s a masterclass in manipulation.