1 - They aren't co-workers, no idea where you got that from.They are coworkers . Coworkers are known for breaking up marriages . I would be willing to bet they have already had sex . She just isn't telling you . Did you get sex that night or did she come strait home and jump into the shower . Before you could get close to her. I would be willing to bet that they are already telling each other ( I love you ) behind your back. Look at her phone and see what they are talking about.
2 - I can assure you that they haven't.
3 - I have full access to her phone and emails.
4 - You're an idiot.