Many years I fucked a mates wife in the back of my London Taxi after picking her and my wife up from a night out.
We'd always fancied each other and flirted but I could tell when I picked her up she'd had a drink and was particularly flirty. I dropped my wife home first on the pretext of letting the baby sitter go home then I drove her friend to a quiet spot and got in the back with her. Our hands were all over each other and within minutes I was licking her wet pussy and then she gave me a blow job, she said after that she didn't give her husband that but wanted to with me, what a turn on that was. I sat on the back seat and she straddled me and rode my cock while I sucked on her big tits. I came inside her.
She insisted when I took her home that I come in with her. It was surreal knowing ten minutes earlier I'd fucked her and cum inside her while I chatted to her husband.