
She catches her fiancé cheating and marries a homeless stranger on impulse. The stranger is a billionaire werewolf leader.
One reveal does double duty: the "marries a nobody who is secretly rich" beat is the billionaire genre's signature, and the fated-mates bond is the werewolf genre's. Hidden identity is the device the two genres share, and this crossover uses it to make them the same scene — the stranger off the street is both hidden heir and destined mate.