My GF cuckolded me

My GF cuckolded me on the weekend.
Started with her telling me on Friday that this 18 year old guy kept hitting on her (I'm 24 and she's 20). I asked her if she thought he was cute. She tried to deny it but finally came around to admitting to me that she thought he was very cute. I immediately felt a rush of jealousy (I've always been very jealous of her) but for some reamister I also felt horny about it. I sort of blurted out (without thinking) that she should go for it. She was surprised that I would say something like that but she was very eager to go along with it once she determined I was serious.
We laid out the ground rules that I had to be in the room hiding in her closet so that nothing bad would happen.
I ended up watching her get fucked for about an hour or so by this 18 year old stud. Was such a strange sensation seeing them first get naked and then actually fuck.
Any advice?

What advice do you want?
You are the one who is now in a position to offer advice.
Did you Fuck her right after and how did you feel once your hardon had gone away?
How did you feel the next day, and how are you feeling now? How do's she feel? Ashamed or wants to do it more, and how do's that make you feel?
You have many answers for those of us who are turned on by the thought of this but havn't actually done it yet.

You are right on Zenner...That is my biggest fear is what happens after the hardon is gone and you look her in the eye or you still have clean up duty.

I know things that turn me on have changed a lot over the years and I am surprised that this sort of thing does now, but my fear is that if I move forward and my tastes change in a year or two, where does that leave me...

Any words of wisdom (or cautions) Derek24?

derek24, your a very lucky man you should get her to do it again straight a way

I'm still horny about it and can't believe I actually saw this 18 year old guy fucking MY gf. She clearly stated that she wants to be with me and that this fuck was just for fun only. I can understand that because sex IS fun.
I just wonder if I should let her do it again.

10 years ago i talked my wife into fucking an exboy friend of hers who was black. It all started by me asking about her sex life before we were married. It really turned me on. But when she started to tell me about the black guy, man...I could only think of one thing from then on and that was seeing her fuck a black guy. So I searcarbonsmudged and searcarbonsmudged until I found him. He was quite a nice guy and really fun to hang out with. Nothing happend for the longest time. We would go out to bars with him and we woud get pretty buzed and I did everything to get them together. And every night we would go home I woud whisper my fantasy of her fucking him and we would both have the most amazing orgasims. Then one night we at this bar and it was time for him to go, my wife stoped at the bathroom while me an the guy walked out the back door into back parking lot. And he asked what I was doing. So I told him my story. Thats all he needed to hear as soon as my wife came out he was all over her. he started kissing her and she looked at me and all i could do was smile and nod my head in approval. He was so quick, the next thing i knew he had turned her to face me and had her pants pulled down. she leand towards me and we kiss as he entered her from behind. but i wanted to see, so i knealt down and she steadied herself on my shoulders and he continued to fuck her. he even used his dark black hands to move her lips so i could better see his rod entering her. God it was so hot. All this was going on right next to our car where anyone could have see us. After he emptied his load into her, she pulled up her pants and kissed good night. I must have broke the land speed record to get her home. We rushed up stairs and she wanted to go to the bathroom, but I just started stripping her to get at her hot cum filled pussy. Man the feeling is like I can not even describe to you. Hot, sloppy, god i came in a matter of seconds. I kept telling her how much I loved her and it was everything I imagined.

We carried on this relationship for about a year. My only rule was never without my knowlege. Well they broke that rule. Then our relationship started to break down. We did manage to get through that rough spot, especally since I started missing the hot action. But then they got into a fight about him bringing me a girl (which i really enjoyed, but the wife hated) Anyway thats what stoped my fun when i fucked the another girl. But there were times when i felt miseralble about the night before but not very often.

Its been 10 years since I have had a hot 3some, we are still married. So all of you want-a-bees listen up. If you have a strong relationship and set ground rules you can have a successful sexapade. If things are not so good now, this will only make it worse. But I have been trying (unsuccessfully) to get her to do again. I have even just met a black guy just to suck him off to relive my frustrations. I feel if you are visiting this site eventully you will either have a cuckold relationship or get divorced for other reamisters so you might as well go for your feelings. Its not healthy to suppress who you really are. Belive me I know!

Very interesting and much "food for thought". Thanks Daze.
Derek...just go with what feels right seems to be the answer here.
If it dont feel right dont do it, otherwise go for it Man