My best friend Anna and I had done everything together by the time we were sixteen. We had gone through high school, GCSE's, holidays and boyfriends together and we were virtually inseparable.

I'd always admired Anna; she was funny, popular and beautiful, with long blonde, slightly wavy hair and slanting blue eyes. I totally understood why men found her so attractive.

By the time we got to the sixth form, we were at one another's house every evening after school, supporting each other through The Taming Of The Shrew and French grammar. We used to flop onto her single bed and mix revision with reading hair magazines and discussing our latest crushes.

One particular Wednesday, something happened between Anna and I that was so wrong that it felt so right. It was a stuffy, uncomfortably hot July day. Anna and I had stripped off to our knickers, but were still wearing our school shirts. There was nothing unusual in this; Anna and I had seen each other in underwear hundreds of times and we were comfortable. However, something was different about this occasion. Anna had asked me to take off my skirt as she was removing hers, so I did. As we lay on our tummies on her bed, laughing at the dodgy haircuts in a magazine, I wasn't sure if I had imagined a hand brush the underside of by buttock. I tried to ignore it but inside I felt that something had sparked inside me.

About half an hour passed, but I convinced myself that I had imagined the touch, as Anna seemed perfectly normal. We carried on flicking through her hair and make-up magazines, then Anna stopped at a perfume advertisement. The advert featured a nude woman with beautiful large breasts and full thighs. Anna studied the picture and then said "Are yours as nice as hers?"

She was half laughing, but something told me that she was serious, perhaps the way that she held my gaze until I looked away. She carried on looking at the woman in the advert for a while and I tried to read some of Wuthering Heights, but just kept reading the same line over and over.

I was thinking about going home, when Anna turned to me, smiling mockingly.

"Show me yours, then," she said. I laughed and didn't respond, hoping that she would forget it. But she said it again,

"Come on Jess. Let me see them!" I sat up on my knees, unsure of whether I had understood her correctly. Then, Anna leant across and unbuttoned the buttons of my stiff, white shirt. I didn't understand what was happening. My nipples were hardening and I was pulsating between my legs.

She stared at my chest for what seemed like hours, and then she ran her hands over the swell of my breasts, as though she were testing them for ripeness. Then she leant in and brushed her full, soft lips against mine so lightly, but it felt so intense, so different from the roughness of boys I had kissed before. I felt her tongue part my lips and ease its way into my mouth. She was so close that I could feel her breasts pressing up to mine. I recognised her smell of excitement from the times that I had masturbated at home.

Anna then reached around my back and unhooked my bra. As the bra came undone, Anna took the weight of my breasts into her hands and squeezed my already hard nipples until they were like bullets. She gasped as she saw my erect nipples and then removed her own bra. She too had hard, pink nipples, which she rubbed against mine. It was a turn-on to look at our breasts rubbing together.

I bent down so that my face was in front of her breasts. I opened my mouth and took one of her nipples inside and gently began to suck. I heard her gasp with pleasure and all the time she was groping my tits roughly.

A thought raced through my brain - 'I shouldn't be doing this, she's my best friend,' - but I was past caring. I could feel the wetness dripping down the inside of my thigh.

At that point, Anna slid her hand between my legs, feeling for my throbbing clit. She took it between her thumb and forefinger and massaged it as she must have done to her own. This tipped me over the edge and I felt my cunt shudder as I came all over her hand. She smiled, then lay back on the bed, with her legs spread open.

"Taste me Jess" she asked.

So I positioned myself between her legs and did what i imagined I would like done to me. I flattened my tongue and rubbed it all over her soaking pussy. It tasted sweet yet musky, and so beautiful. I carried on lapping away at her cunt, and instinctively pushed two fingers inside her sticky wet hole. I felt her shudder to orgasm like I had done minutes earlier, and a broad smile spread across Anna's face.

I didn't feel embarrassed or ashamed, and neither did she. We did it all over again a few weeks later, and even though now, ten years later we are both married, we still meet up. And I wouldn't change a thing.