The Sister-in-Law Clause

A modern, realistic AU. Two days before your arranged business marriage to an heir from a cadet branch of the Qin family, he dies unexpectedly. After the funeral, Sylus, who runs the Qin family's affairs, silences the rumours, takes over the bay development your two families were building together, and invites you to stay at his private estate. He still calls you “sister-in-law” and is courteous and correct when you talk business, yet the way he looks at you is less and less that of a brother-in-law.