My wife confessed her fantasy with my best friend. [MF]

True events, a name or two has been adjusted but true.
After many months of being locked up for work and Covid my wife and I made it back to our home town where most of our close friends live. We went out with my best friend for dinner and had a great time socially distancing while drinking a safe amount. It was great to see him and catch up as he’s wrapping up college and quite busy lately. A few days later on our ride home my wife and I got talking sexy talk and she randomly asked, “Do you still have that threesome fantasy?” Shocked and slightly amused I responded something along the lines of: “well I think most men dream of watching their wife get pounded in the third person view” She smiled and I inquired more which led her to mention if she ever agreed to one it would be my best friend. I found it quite amusing and she changed the subject quickly. We didn’t talk about it for a week or so as I needed to process her question and let it soak in her head. One night I inquired about her question and she immediately disowned the thought and said it was embarrassing which made me realize she was actually thinking about it. Over the next few weeks I probed about it on and off with mixed results. I love writing sex stories for her to read when she takes her alone time so I wrote a few options with my friend in the mix. I gave her the first one while we were on a week vacation and when she emerged from an afternoon “nap” her hair was all frayed and the look of pure excitement made her grin from ear to ear. I didn’t even finish asking about the story when she grabbed me for a solid kiss. I think she dragged me into the bedroom and we had sex but I can’t quite recall now. She spoke much more candid about how she liked the idea and would consider actually doing something if it felt right and she was boozed up. I wrote another story about a weekend this winter where my friend is coming to stay with us and how I’d ask him the last time he got action (he broke up with his long term girlfriend over a year ago and has had very bad luck dating since) and if the response felt welcoming my wife will go into the guest room after we goto bed, with lights off suck his dick, and hopefully take a condom to get destroyed. We’ve roll played it several times now and I’ve had her yell his name, pretend it’s him, and convince me that it wasn’t awkward and would be fun, her treat. I actually feel pretty good about it, I’m worried it might make some awkward tensions but he did get dared to suck her nipple years ago and has seen her tits several times.