I'm a 53yo bi guy in the UK. About 4 yrs ago I arranged my first MMF meet with a couple, Lesley & Adrian from Birmingham. She was lovely, looked like a mum you'd see at the school gate, dark hair, gorgeous brown eyes and nice legs, cuddly figure but not fat. They lived in a small terraced house in the suburbs and I loved turning up there on a Saturday morning, neighbors out & about, me knowing we were going to be having sex. On my arrival she was wearing a soft black leather dress, heels and her legs bare & smooth. She had an ankle tattoo of Tinkerbelle that I found a huge turn-on. Adrian was nice, slim same height as me and he took the lead in conversation, as Lesley was clearly a bit nervous. I should say at this point that they did not advertise any bi-content to their play and I wasn't expecting anything to occur in that regard. That said, I knew that if the issue cropped up I would be keen to try something - I was bi-curious and had been for a long time, which is I why I wanted to see a M/F couple.
After chatting for 20mins in their lounge to get to know each other, Lesley took me upstairs to their bedroom and asked Ade to come up when he was ready. She and I undressed and started playing on their bed, and by the time I was going down on her to lick her wet pussy she was fully into it and crying out in pleasure. Ade came into the room, stripped quickly and joined us on the bed to offer his hard cock for Lesley to suck. So here I was, in bed with my first couple and my first sight of a cock in close quarters. It felt completely natural and I found it difficult to keep my eyes off Ade, he had a lovely lean body and a gorgeous cock but I assumed he was straight and we got on with the business of giving Lesley a good hard seeing to. I found it amazing to be next to them while they were fucking, Lesley in missionary, me stroking her breasts and thigh nearest me while Ade slid his slick erection in and out of her cunt. Nearing his climax he pulled out and ejaculated powerfully in a straight line from her pussy, up over her tummy and chest and onto her chin - I was mesmerized.
Once she had been cleaned up (with a wet-wipe sadly), she and I got into a 69 with her on top. We were at this for a quite a while and both getting very horny while Ade lay next to us and wanked himself back to hardness. Then he changed position, got behind Lesley's upturned bum and eased his cock into her vagina. God James, I'll never forget that image of Ade's hard penis so close to my face and the clean fragrant smell of his body as he slid in and out of his wife. His balls were grazing my forehead and the couple's wet union was just an inch or two from my face. I tentatively started to lick his shaft as well her clit as he reamed her slowly and again, it seemed completely natural. I was nervous though, wondering if Ade would catch on and take offence.