I'm going to cheat on my gf with a co-worker to get a career boost
That seems pretty crazy, do you think this work?
I always wanted to get into the marketing field so I'm willing to risk it for this.
It is expected you will be faithful to your partner. It is also sexual harassment and a crime for someone to offer you a job position for sex.
I don't care and I'm going to do what I want.
If HR finds out you could both lose your jobs. Your gf will find out about this eventually. Why not work hard or apply for the promotion?