Accidentally Married to the CEO

Zoe accidentally sleeps with her boss, leading to a secret marriage. The boss posts their marriage certificate. Zoe believes he married her to provoke Vivian Shaw, who targets Zoe. The male lead defends Zoe. Vivian Shaw mocks Zoe. The male lead refuses an arranged marriage with the Shaw family. Grandma Ford favors Zoe. It's revealed Vivian Shaw impersonated Zoe as the true heiress. They get their happy ending.