Unusual path to wife share

I would love to hear your thoughts and reaction to a fantasy that turns me on the most when I think about it. My girlfriend is very beautiful, super sexy and has proven to be more open-minded than I ever thought she would be. Been taking baby steps to see how far she will go. She hasn’t stopped me yet. First step was asking her to wear a fishnet top with very small squares with nothing underneath along with short shorts while walking from our car to our boat slip. We only passed one guy on the way and he got a good look at her chest as I walked behind her. I shared that I thought that was really hot. She shared that she enjoyed it. Got the nerve to ask her to go to a nude sun club. So hot watching the stares she got being nude all afternoon in front of so many people. While there I wanted so badly for someone else to touch her. Maybe while putting sunscreen on her. People were friendly and even flirty but there is a strict nothing sexual culture. There are kids there and I get it. But, I knew I wanted her to do more. For some reason I am stuck on a fantasy that is exhilarating but also surprised me that it turns me on so much. Not sure what it means exactly. Would love to hear your thoughts. My fantasy is that my girlfriend and I have a buddy over. We share that we went to a nude sun club and both enjoyed it. I ask my girlfriend if she would be willing to go back to the sun club with my buddy. Without hesitation, she said she would. I get so excited thinking about her saying that for real. So in my fantasy I ask her, “so you wouldn’t mind if my buddy here saw you completely naked? She says no as long as he is ok. So I ask my buddy if he would be willing to go to a nude sun club with us. He says “absolutely”!! So then in my fantasy I tell him that if he wrestles me and wins he can undress her and she will hangout naked the rest of the evening. I add, but if she is naked, we should be too. I add, in fact, we should wrestle naked. If I win you can watch us play and jerk-off if you want. If you win, you can undress her and play with her and go as far as she lets you. My buddy and I get naked and start wrestling. Soon we both have raging hardons. I find myself wanting to accidentally touch his hardon, or feel it against me. This is something new and very confusing for me. While wrestling I know I want to lose so I can watch him play with my girlfriend but I want it to be a hard fought battle. At one point he is on top of me 69 and I get really excited seeing a shaved cock and balls that close to my face. Again, so confused by the feelings I had. Finally he pins me. We stand, shake hands and he asks if he really can undress my girlfriend. So I ask her, hey babe you said you would be willing to be naked in front of him but I didn’t ask if he could undress you or play with you. Are you ok letting him undress you and start kissing and touching you if you can say stop at any time? She was surprisingly quick to say sure. I thought it was so hot watching my buddy walk up to her with a raging hardon and start making out with her first. I wondered what she was thinking as his hardon pressed against her and how far she would go. In my fantasy he stops kissing her, then takes a half step back and starts undressing her. Now my mind is begging her to let him fuck her. More confusing thoughts as I start imagining him fucking her and pulling out and shooting cum on her tummy and tits. I fantasize going over to her on our bed as she lays there with his warm cum on her. I fantasize about getting on top of her and feeling how slippery our bodies are with his cum making her skin slick. I imagine slowly sliding down to kiss her breasts and tasting my buddies cum. As I lick more of it off her breasts and nipples I wonder what he and my girlfriend are thinking. Neither says anything or tries to stop me. I slide further down and lick more cum off her tummy before sliding down further and teasing her clit with my tongue and licking her swollen pussy before enjoying seconds. Love this fantasy but also conflicted about all the different elements. Watching someone with my girlfriend, wrestling a guy naked, having the urge to stroke or suck a cock or balls when they were close to my face and being excited to taste my buddies cum in front of him and my girlfriend. I never fantasize about sex with a guy or look at a guy on the street and think, wow he is hot. Only think about a guy when my girlfriend is there and stuff happening between me and another guy happening almost by accident. As far as watching my girlfriend being excited to play with a guy in front of me, that I know I love. Have any of you had similar fantasies or acted out like this? What do you make of my fantasy?