If coverture justified patriarchal control and legally erased many aspects of wives’ separate existence, did this mean that husbands in eighteenth-century England also enjoyed absolute authority over their wives’ sexual bodies? This article examines how contemporaries described the sexual boundaries between spouses and what wives could do when they had been violated by their husbands. Wives had few legal protections and limited social and economic resources to escape unwanted marital sex, but the small number who could afford the high costs turned to the ecclesiastical courts to legally separate from their husbands. The five case studies from the ecclesiastical courts explored here are exceptional, first, because sexual problems were at their core, and second, because unusual collateral evidence survives describing attorneys’ and judges’ opinions about spouses’ bodily rights within marriage. Whether they were seeking relief from reproductive toil, venereal infection, threat of sexual violence, or trauma from marital rape, these wives wanted to escape their husbands—but they faced hurdles. Because English ecclesiastical law did not explicitly identify sexual discord as justifying marital separation, the women's attorneys had to demonstrate that unwanted sexual relations were acts of cruelty. By invoking bodily safety, decorum and propriety, and sensibility and sympathy, advocates argued against husbands’ absolute conjugal authority. The author considers how broader transformations in beliefs about gender and sexuality may have resulted in giving wives slightly more room for protection by the second half of the eighteenth century, particularly when they faced the threat of marital rape or venereal infection.