Exploration of desires

I have always had the biggest fantasy of doing the following with a girlfriend.

My girlfriend and I, hand in hand walking along a bush (country) path, her in a beautiful sundress that buttons up from the front, me in shorts and a t-shirt on a wonderful summer's day. As we are walking along, we see a gay couple passionately kissing and rubbing each other's crouches. Surprised, but very intrigued we watch, and I hold her from behind. She feels me starting to grow at the gorgeous sight in front of us. She whispers to me "I am getting turned on by all of this. Them so passionately involved and feeling you. I would love to share you with a man." I hold her tighter from her suggestion. The 2 men have started to progress deeper into their passion for each other. My girlfriend and I are really being turned on by the sight in front of us. I say to her "I would so love to share a guy with you, but I don't know how I would umm start to pleasure a man. I'm afraid to try. I want to try, but I'm scared." That's when she reply's back "that's why we will share. I would love to be able to show you how" She grinds harder into me. Taking my hand, she leads me to the couple and ask, "can we join please? I want to teach my man the joys of a man". They agree and romantically, passionately& beautifully she shows me how and shares me with them. All four of us sensually pleasure one another orally and penetrative. As she is lying and orgasming with 3 men wanking each other over her, kissing each other, turning her on they shower her in their cum. I then lick some cum off her breast and nipple then kiss her passionately and sweetly. Holding her in absolute love.