Many, many moons ago, I remember how it felt like Christmas when my girlfriend Lily agreed to being shared with another man. There were three conditions, as we started out, for her comfort and assurance.

Dipping her toes into swinging, she wanted me to be present and in physical contact with her as she was being fucked.  As if I’d have it any other way! I was looking forward to seeing the look of lust and pleasure on her face as she was being fucked, and I was certainly planning to be touching her - ideally playing with her gorgeous tits, while she had her lips around my cock, while she was being fucked.

She wanted the guy to just fuck her and leave - she wanted a purely physical encounter to start with, no chat, no getting to know each other - and she wanted me to fuck her immediately after.  No arguments from me. I was looking forward to seeing her cum filled pussy and the sensation of fucking her after being used.

She wanted it to be a surprise, and ideally happen as if it was just happening, not planned and she didn’t want to know when it was happening. She didn’t want to stress and second-guess things in the lead up to a date circled and noted as ‘stranger threesome sex’ on the calendar.

Finally, she didn’t want to know who was fucking her, and made me promise not to tell her before or after who it was. Ideally she’d never see him again. She told me she wanted it to be as purely physical and impersonal as possible to see how she felt about fucking someone else while with me.  That would be more difficult. Napier was and is a small place, and there was every chance of bumping into someone at the pub, supermarket or a cafe. I thought about organising an out of town visitor, but the admin and scheduling was a total mood killer. I finally settled on a plan.

Having said she didn’t want to know when it was happening, it didn’t stop her bringing it up and asking me.  My first response to that - “I’m not telling you. You don’t want to know” - got me a grumpy girlfriend giving me the cold shoulder. My second approach worked much better.

We were fucking in bed at my place one evening. I was laying on my back and Lily was riding me, grinding herself towards another orgasm. I reached up to cup her tits and rolled her nipples between my thumbs and fingers, squeezing firmly. As often happens that was the final straw and Lily came loudly, tossing her head back and pushing her tits harder into my hands. I loved the feeling of her juices trickling down my balls.

She collapsed forward on my chest smiling and kissed me. “Hmmm, mmm! For that, you get a special treat!” she said. Sliding down my body she got on all fours between my legs and started sucking my cock.

She looked in my eyes while flicking her tongue around the tip, stroking me slowly. I looked past her and enjoyed the sight of her ass and pussy in the mirror by the door. She saw my gaze and knew what I was looking at. “Perv” she teased, reaching back between her legs to play with her wet pussy, holding her pussy lips apart and then slipping two fingers inside herself.

“I fucking love watching that while you suck me” I told her. “What if I was looking at a guy coming through the door? He was watching us fuck. He’s naked and hard.” The idea clearly turned her on and she fingered herself more deliberately, rather than to put on a show for me. I held the side of her head and thrust up into her mouth as she fingered herself. She was close to bringing herself to orgasm. I watched in the mirror as she pleasured herself, holding back my own orgasm.

“He’s going to fuck you from behind while you suck me.” I said. Lily rubbed her clit hard with the palm of her hand while 2 fingers curled in and out of her pussy and I watched in the mirror as she came. I waited for her climax to ease, and Lily to refocus on my cock in her mouth before letting my own orgasm explode. Lily swallowed greedily with a moan of approval as I came in several spurts, before licking my cock clean.

After that, we talked about the scenario several times while fucking, and it always led to amazing sex, and Lily stopped asking 'when’. Instead, it was like we were living out the scenario each time, but without the other guy.

Until the day when there was another guy.