A quiet office at 1am, young man and woman, overtime office sex

Unexpectedly, I was alone with my girlfriend, a colleague I had been interested in as a member of the opposite sex... and my sexual desire never stopped. From morning to night, someone would come in the office where everyone works normally, and it was exciting to have sex. Even the sound of a blowjob echoes in the quiet office... There are no condoms in the office so the two of them are raw