We originally met, me in my early 50's and Tilly 45 on the internet, both of us were married (unhappily and sexlessly) and using the web to arrange stranger meets for sex with our first meeting being for a stranger fuck in a motel by the M1 motorway - we both loved, and still do, anonymous sex with strangers! Initially we were just Fuck Buddies, then fell big time for each other and set up home together, but we both really wanted to carry on meeting and having sex with others. So, for the first few years we had an "open relationship", although living together in the same house and occasionally swinging together we continued to be online under our separate IDs, to meet and have sex with others.
The only agreement we had was that we told each other every detail; in fact, nothing was better than both arriving home having screwed with others on our dates and then having a horny fuck session whilst we each related all the details of what had just happened to each of us on our dates. The following sequence of events all happened toward the end of that period in our relationship.
We also used to go out to swing clubs together, one weekend we were at a swing club in the jacuzzi relaxing after having played with a new couple there. Along came another couple we'd not met before - Mike and Maxine - we started chatting, he especially was very pleasant. Mike stripped off and got in the water with us with us (we were of course all three naked), Maxine stayed outside (she was quite a butch looking woman). Mike had a nipple piercing and a metal cock ring around his dick and balls.
Tilly was quite intrigued by this, next thing I know he has taken the ring off and is putting it over my cock and balls. Strange (having always been hetero up until that moment) but it didn't feel intrusive and I was quite happy for him to do that. He even gently wanked me to get me hard again. Have to say Tilly and I were both very turned on - not sure how it happened but Mike ended up sitting between us, wanking me with one hand whilst turned toward Tilly, snogging her and playing with her cunt with his other hand. Maxine just sat there, outside the pool, watching and smiling.
It seemed obvious what the next stage was, so we went upstairs to a playroom. Maxine also got undressed and snogged with me; Mike and Tilly were getting along like a house on fire, Tilly clearly really fancied him and him her. It was fairly clear Maxine was really only interested in Tilly and somehow we ended up all together on the floor, me on my back with Tilly above me on all fours her cunt above my face, blowing me whilst sharing my cock with Mike (now that was new, but very horny), Maxine was playing with Tilly's cunt in my full vision, then she worked her whole hand inside and was fisting Tilly - Tilly came almost immediately and spurted loads all over my face which made me blow my load into a mouth (not sure if it was Tilly or Mike) and they proceeded to snowball each other with my cum. A very good meet and Maxine got Tilly's phone number saying she would love to call her up.
As we guessed she contacted Tilly for a date - we had an open relationship - so no problem there for either of us. They had a few dates and had sex, just the two of them, then Maxine suggested trying lesbian clubs, Tilly ever keen to push her boundaries went along with Maxine. After a couple of fairly normal events where Tilly just played with a couple of other women there, it got a bit deeper and on one occasion they went to a lesbian swing party and she was gangbanged by three butch Dykes (including Maxine) with dildos and strapons. I guessed that her "friend" Maxine had set this event up, but Tilly thought it had just happened. Strange thing is she's never been up for a male gangbang, but with lesbians she was OK.
One night we went to a swing club to meet up with Mike and Maxine. It was the club in Kent we originally met them at that we often use. Downstairs is just a large social area, apart from the women wearing sexy and, in some cases, revealing clothes, you could almost think you were at any ordinary social evening - there is a bar, dance music playing and apart from a few TV screens showing porn loops it is all appears quite innocent. Tilly looked great, she had on a see-through lace halter neck dress which ended only inches below her arse - it was obvious to everyone that apart from black holdup stockings there was nothing underneath.