I'll Always Remember

This is a true story. About 20 years ago I was dating a highly sexed woman, she was 15 years my junior and very adventurous. We had many memorable adventures but one has always stayed with me. We pulled into a layby and quickly undressed, she was laying on the back seat and I was fucking her when a face appeared at the side window. A man was peering in which didn't phase us as it had happened on a few occasions. My gf decided to open the window a crack as they were steaming up so his view wasn't impeded . I was putting on a good show but was well aware it was my gf's body he was interested in. Suddenly she decided to fully open the window which made me uneasy. His hands were groping her tits and then he lent in and kissed her. I was still fucking her when he opened the door and before I could object he had offered her his cock which she started to suck. I remember feeling jealousy and arousal in equal measures. His hand made it's way down her body squeezing her tits, over her stomach to rest on her engorged clitoris and with circular motions and my cock thrusting in and out of her she had a extremely strong orgasm. He was kissing her again when she whispered something to him. I watch as his fingers headed back towards her clit but instead of resting there he flicked my shaft from her c**t and gave me a bj. Now this did shock me as we'd only had threesomes with girls and I wasn't prepared for it. The excitement was to much and I jizzed in his mouth and I remember confusion as I watched him swallow. My gf loved it however and managed to wriggle free and was on her hands and knees helping him clean me up with her tong. No sooner had I got my head around a gay bj when I realised he was behind my woman with his cock inside her. A steady rhythm had developed as he fucked her, her hand squeezing my balls as she looked up as me saying, 'ohhhh that some good cock'. Again I felt jealousy but this time with mixed emotions as I watched him pleasure her. He slapped her arse which instinctively made her turn over laying on her back. I looked on as his shaft disappeared from view as he lent forward and he gave me another bj. My gf was loving the gay scene and came again, this time I didn't cum mainly because he withdrew. He was really going for it and I asked him not to cum in her 'only if you lick my cum from her belly'. What could I do I didn't want her pregnant by another guy so agreed. He started to throb and then pulled out and sprayed her stomach with white pearl streaks. My gf sucked on my knob as I lapped up his spunk from her belly, mound and then the sight of sperm dripping from her fanny. That sight broke me and as the sadness engulfed me I felt the tip of his dick push against my anus. I just let it happen as my gf goaded him on. When he had enough he just pushed my ass away. He was in my gf's vagina again kissing her as he bred her a second time. Upon completion he offered his glistening cock to me and I not only cleaned him up but gave an enthusiastic bj to boot. As I struggled to swallow I watched as he again mounted my gf kissing her tenderly, this was the last time before he walked away whistling.