Stucky One Shots Random AU, Smutty, fluff?, requests are always open

In a story where a sick family Mr and Mrs Matthews hires Koltin Smith, a young but talented hitman to take out Chase Edwards; the youngest son of the Edwards family after a long history of family drama which the Matthews worked in Mr. Edwards business, but had enough of them. ...." But I don't want this to be quick and simple, i want it to be long and painful... for all." Mr. Matthews said over the phone " What would be ideal is that you become great friends with Chase and his family. Gain their trust.'' he continued ''After you gain their trust. take him out.'' Matthews ended. "Perfect. Is that all?" Koltin asked.... *this is my first story so if it's bad i deeply apologize and I will try to improve*