I don't mean to sound harsh here, but this is a "reality check". She did NOT TELL YOU because she KNOWS YOU! All you have to realize is how you are reacting here, all of the drama, all of the mixed feelings, etc. You wanted her to do it, you encouraged her and she did do it, on HER TERMS. She's not going to come to you to get approval for every guy she wants to play with. She really shouldn't have to. If you just leave her alone about her sex life and let her enjoy it, then you will probably enjoy it more also. You have to realize that she's going to fuck other guys and that's what you encouraged. You have to get past the hurt and betrayed feelings and just enjoy the thrill of this. It's VERY difficult and that's why this type of relationship is so tough. As much as you guys want this in your fantasies, when it happens and you aren't in control of it, then you can't stand it. Just try to get over it. People from work know about it and her friends probably know about it. Just act normal and understand that those other people really don't matter at all to your relationship.
The one thing I would be concerned with IS your relationship. None of this will work if your relationship isn't solid and in that case you must insist that she stop. She MUST understand that your relationship is most important. That doesn't mean that every time YOU feel betrayed or angry that some other guy is fucking her and then go back to encouraging her when you're horny again, that it's a RELATIONSHIP issue. A real issue is either of you losing interest in the other. It would take me far too long to put together some sort of article on how my husband and I have gone about this since day 1 and I doubt anybody would read it anyway. We were always pretty sexually uninhibited and pretty far out there when it came to adventure. The REASON I cheated on him was because it was convenient, I got a thrill out of it and I knew he would disagree with many of my choices. I wasn't willing to abide by that. He WANTED me to do this from before we were married, he encouraged it, etc. I cheated because I did not really know how he would react once it became reality and I didn't want to lose him over it if for some reason our fantasy became reality and turned him off about me. It didn't work out that way, but I was willing to risk "cheating" and getting caught because I always had the fact on my side that he encouraged it and that I had told him I was NOT going to be faithful. Whether he actually believed that, I didn't know at the time. I had TONS OF SEX outside of our marriage and I didn't know if he would approve of that either or just figured "fooling around" and the occasional slip up with a few guys was as far as it would go. It went much farther, so I lied and kept up what I was doing. I did try to mind his feelings, not risk our relationship and avoided ANYTHING that would threaten his career reputation. He admitted later that he knew about many of my adventures and was actually turned on by my lies. I know they were stupid and not believable, but I had to come up with something and he had to trust me due to our "rules".
I know this is convoluted and is so brief as to probably seem a bit incoherent, but I can't write a book on here about it and I wanted to get these points out to you. Just let her have sexual pleasure and don't give her grief about it. Mr Hw and I had very few rules, but we agreed that we would NEVER badger one another about any suspicions we had or what we had been doing. We could ask and the other could not reply. That was how most of my cheating went down. Even if he suspected, or actually caught me, he couldn't say anything about it or if he did I would lie to him and he HAD TO ACCEPT my answer. WE NEVER had any sort of tiff over my sexual dalliances and I have always had a very active sex life outside of my marriage. There were times when I stopped or slowed down significantly during the years, but having an active dating and sex life outside of my WONDERFUL marriage has always been important for me. I can't imagine being married any other way.
Oh well, you can ask questions if I've confused you or just ignore this. I'm trying to help but understand if it's confusing.
Best of luck
Mrs Hotwife
EDIT: THIS IS VERY IMPORTANT I NEVER gave him reason to be jealous of my love or my dedication to him. I NEVER got involved in any sort of relationship that involved "feelings" for another man. I believe he knew I was always about sex and NOT about the "love" of someone else. I told him he would ALWAYS have my love forever in the same conversation that I told him that I would not be faithful to him with my BODY. Two totally different things.
Also, we've never had substance abuse or alcohol problems, problems being responsible, problems holding jobs, etc. I'm just a normal wife with a VERY slutty secret life. I understand that all of those things can put much stress on a relationship and could make the way I do things seem a bit impractical for those with different issues.