It started about a month ago. My eldest lad Rob is 18 and had started going out with this really nice girl called Emma who's the same age. They are both doing 'A' levels and are in the same class at college. They've been working on a project during the summer which meant she was coming over to ours regularly and I would run her home in the car at the end of the evening. We got on well and had good chats during the drive from Leeds to York. One night she was trying to persuade me that pop music today is as good as it was 20 odd years ago and I pulled over into a layby on the A64 so she could show me some new dvd she had with her. Anyway I agreed with her that it looked impressive and on the impulse gave her a quick kiss to tell her what a clever girl she was. Somehow I hit her lips rather than her cheek and next thing we're into a full snog and she's pushing her tongue into my mouth. Obviously I'm enjoying it but I kept my head and pulled away telling her we'd better drive on. We got to her house with not a lot more said and I dropped her off but I couldn't stop thinking about her. The next week I drive her home again and she suggests we pull in again for another chat. I really didn't need asking but she made the first move I swear it. She's leaning across me and we're snogging properly. I'm running my hands up and down her back and I could feel her bra strap. Meanwhile she's pushing her hand behind me and getting it up inside my teeshirt. I could feel her tits pressing against my chest but the fucking gear stick and steering wheel were stopping me doing much else. So going back to being a teenager I asked her if she wanted to move into the back seat. Like a shot she's out the door and into the back and I'm doing the same not even looking to see if there was anyone around. Without anything to get in the way she soon had her hands down the back of my trousers squeezing my arse and i'm sliding my hand up those lovely thighs to the firm mound at the top. I could feel her slit through her panties and gently eased he legs apart so i could slip them down. She felt lovely, some silky hair to part and then a lovely moist twat as I slid my fingers in. She's moaning and groaning so we soon reached the point of no return and I lifted up so i could drop my trousers right down and i entered her with no more preparation. I'd forgotten how tight a teenage cunt was and my prick was only half in when I had to pull out to let her expand a bit more. Eventually I managed to get in right up to my balls and began to shag her properly. In no time she's got her legs wrapped round my arse and she's yelling and orgasming over and over and I've not even blasted my load yet. But when the time came I pushed in as deep as I could go and let it shoot. She's got her feet on the fucking roof of the car, she's biting my ear, allsorts. When I'd finished I pulled out all floppy and we just lay there like a couple of young lovers. She's smiling away and telling me how great it wasto have a man rather than a boy. I'm thinking fuck, what have I done? As soon as i could, i told her we'd better get dressed and I'd get her home. I needed a piss so I got out the back door to use the hedge before we drove off and saw there was a fucking Safeway lorry parked up behind us with the driver giving me the thumbs up.. He'd obviously seen exactly what we'd been doing. I drove off pronto and got her home. And before you ask, yes it's happened again since and yes, i know I'll fuck up my marriage and my family if it ever gets out. But that's the power of pussy.