Depends on what the rule was. If it is minor you may just want to keep it to yourself, but if someone will get hurt or it breaks the law tell a supervisor.
Tell the coworker it is not working and if that does not work tell him or her that u will call there partner and tell them what they are doing !!!
just tell him
gee i dont kno...tell them!
Try to change the subject.
if it doesnt affect you negatively
Your girlfriend is playing a game between her coworker and you. It's time to lay down the rules regarding your relationship. She is being selfish and ego maniacal and leading her coworker on and trying to make you jealous and this is simply not love. Stand strong and tell her if she keeps it up she is out the door!
how can someone smell like sex?????
If it is yes most definately.
Infer that you have exhausted your personal knowledge and refer them to a supervisor.
Do something bad, blame it on them and tell your boss they did it!
Jack
Hiring that coworker