Femilove!
That's a bumper sticker I could get behind!
Here's one that happened to me, and, brings up a roleplay, perhaps even a i'd like to try.
My best friend and I had just gotten off work on Friday, and instead of heading to a bar he said he was going to stop to see a friend. We drove to an area of town I hadn't been before, a rundown, industrial part of town, into the back of a garage. He knew a mechanic there. He introduced me, then a little small talk and my friend was asking about this guy's sister. After that, he dropped me off at my apartment, but saying he'd be back in a couple hours and then we'd go out.
I had just moved into this apartment. It was on the top of a 2 story building, part of a 3-plex above a pair of businesses. A stairway went up the outside, and the landing on the second floor was right at my front door, so as you came up the stairs, you could look left and see right into my living room, I hadn't had time to buy curtains, and had no furniture in my living room at all yet.
OK, well, I got ready, and when my friend showed up he had a pretty girl with him, turned out it was the mechanic's sister.
We went out to a bar, started playing pool, and my friend was kissing this girl, so I started looking around the bar for some company of my own, when that girl was suddenly in front of me, whispering in my ear that she hadn't forgotten about me, and gave me a very hot kiss.
My memory gets hazy at this point, it was a long time ago, but I wanted to interject here that the roleplay I'm talking about here is being out in public, an FMF,appearing to be a couple with a girlfriend of the lady or something, then at some point during the night switch roles, with the girlfriend switching roles with the wife, so I start kissing the other...and see who notices, becomes interested, has the courage to approach. It could even become a realplay, like say if a guy got interested and courageous enough to join us when we leave the club, but that would have to be discussed in advance, providers already fully compensated for adding a 4th before the question's popped, so for him it just seems like he's hit the jackpot, but make it clear this is a once in a lifetime thing, that he'll never see us again, and even if he does to say nothing, ensuring he'll brag to all his friends but won't pursue any of us, anyway, you get the idea. Back to the story.
So the next thing I remember, we're back at my place, the girl has stripped and is dancing in front of the window that is right in front of the top of my steps. Then I see the head of my next door neighbor, his wife on the other side of him. If he would have just glanced to his left, he would have seen that naked girl dancing in front of that window, she was even obligingly twirling slowly around with her eyes closed so he would have seen all of her, but he never did. My friend didn't notice either, he was standing against the oadjacent wall and could not see out the window.
Again, my memory fails me, but I remember my friend has stripped and he is fucking her in a standing k9, and I've stripped of my shirt and I'm standing in front of her, playing with her tits, and she unbuckled my jeans, pulling out my rock hard cock, licking and sucking it and I glance at my friend, who has a shit eating grin on his face, saying you can have sloppy seconds and I say fuck you.
Things get hazy again, then I'm taking my turn, my friend and i have switched positions, I remember busting a nut.
After that I felt tired and went into my bedroom, where I did have a bed, a twin bed. My friend and the girl continued what they were doing, then suddenly they were both in my bedroom giggling, she was kissing me and working on my dick, getting it hard again.
Things get hazy again, and the next thing I know it's morning and my friend and the girl are gone. I don't remember her name.
My friend was married at the time, and his wife apparently knew or suspected he was cheating on her with that girl, and they argued a lot after that. He never talked about that girl again, and I never saw her again.
I know that was a lot to write, and to read. I'd really like to try that roleplay, even realplay if all parties are open to it!