[slevin]

I'm not sure that it matters whether anyone else has, or would, be ok with a situation like that. All that really matters is whether YOU are ok with the two of them being together without you there. If you're not comfortable with it, then it definitely shouldn't happen and if you and your wife have as close and open a relationship as you say then she should be totally fine with that.

For me there are a few red flags in what you wrote. I'm not saying these are issues or not, just that they raise a red flag for me:

- She focused on him and not you; even after pointing it out she stated she'd rather be with him alone at first.
- Your friend is married yet his wife is not involved in this. Recipe for disaster.
- You are doing this with your very close friend. It always seems like a good idea to do this with someone close to you like that, but the reality is definitely far different. Some people have made these situations work great for them, but the vast majority end in broken friendships. Add to this that he is married and it gets even worse.

If you are totally cool with them being alone then go for it. Given your circumstances I wouldn't be comfortable and I'd probably back off.

I'd be interested in hearing her reaction to you telling her that you aren't comfortable with that and suggesting to find someone else to join you that isn't already a friend (but that she got comfortable with before getting sexual).