My Contract Wife, The Enforcer

Rhea Wang, a "professional villain," is hired by Benjamin Shaw as his "fierce daughter-in-law" to protect his mother, leading to a flash marriage. Rhea protects the family; they develop feelings and open "Shirley's Diner." Rivals Stanton Dawson, Brandon Lewis, and Mr. Richards try to sabotage them, but Rhea fights back. Rhea defends Benjamin from false accusations. The family lives happily.