It is not as if I haven’t had the opportunities. There have been occasions when I have been with a bloke in his car, being kissed as I have my tits squeezed. Then he moves his head down to suck my nipples. His rock-hard cock is out ready to pleasure my soaking wet cunt.

But as soon as his hand goes up my skirt and attempts to work its way into my panties, I freeze and the moment is over.

This has happened three times over the last two or three years and it has become a very sore point.

But a week after my birthday, my life changes forever. There is a couple that lives next door, both in their late 20s. She always wears short skirts and low-cut tops, which barely cover her huge tits. He is very fit – a real hunk.

One morning, I meet her in the street. She invites me in for a coffee. As we talk, I end up pouring out my anger at my inability to get shagged. “I am desperate for somebody to make me come,” I say. “I have only managed it by using my fingers so far.”

She moves across the room and sits on the sofa next to me, putting a protective arm around my shoulders. She tells me I have probably tried too hard and that I should learn to relax when I am with somebody for the first time. She gently lifts my chin and puts her lips against mine.

My heart skips a beat and I begin to panic as her mouth opens and she tries to ease her tongue into my mouth. But suddenly all my inhibitions flow out of me and I respond by allowing her access, meeting her tongue with mine as it moves in.

Suddenly, my nipples are like bullets and my cunt is squishy, as I become aroused. Her hand begins to unbutton my blouse and slowly slides inside my bra. The tips of her fingers slowly stroke my tit and then I shudder as she takes a nipple between her thumb and forefinger and squeezes.

I can’t believe how I am reacting. As she begins to kiss my neck and throat, I open my legs as wide as I can. She moves her hand down over my body and begins to push my skirt up to my waist. I am soaking as she eases her hand under the elastic of my knickers and her fingers trace a route through my bush.

At last, she reaches my trench, running her middle finger along my lips. They immediately come apart and her finger slides in. I cannot believe the feeling that this is giving me.

With her teeth gently pulling my nipple and her finger moving slowly in and out of my cunt, I am in heaven. But little did I know it would get even better.

I moan as she releases my nipple and withdraws her hand from my panties. But she smiles at me, whispering: “Let’s go upstairs.” I readily agree.

Once there, she starts to strip me slowly – first, my blouse and bra, then my skirt and, finally, my panties. She leaves my knee-length socks on.

She then takes a step back and takes off her top. I gasp as she is not wearing a bra and her massive tits with nipples like champagne corks come into view. I tentatively put out my hands to touch them. She puts her hands behind my head, easing me forward until I can kiss them. She moans loudly as my lips capture a nipple and begin to suck.

She releases my head, moves back again and starts to unzip her skirt, which slides down her lovely legs. Again I gasp as I see for the first time her mound inside her thong. She sits on the edge of the bed and orders me to kneel between her legs.

Again, she puts her hands to the back of my head and eases me forward, until my mouth is on her cunt. I cannot believe the beautiful smell that greets me and I greedily pull aside her thong to push my tongue into her.

She is soaking as my tongue finds her clit and two fingers slide up her hole, sliding slowly in and out. “Faster, faster,” she pants, until, screaming, she comes violently.

She pulls me onto the bed next to her, lying me on my back. She starts kissing my tits, moving down over my belly until her mouth is on my cunt, with her tongue teasing my lips. Something big, hard and buzzing is then pushed into my cunt, which she moves in and out, in and out.

I am panting really loudly now, but, just as I am approaching my first orgasm, I hear a door slam. “Don’t worry,” she whispers, continuing to produce a fantastic feeling inside me.

And then, for the first time, somebody else makes me come.

I writhe under her, moaning and panting, as the feelings of release course through my body, making my nipples feel they are on fire and sending electric shocks through my arse. I almost pass out with the pleasure.

When I look up, I am shocked to see her partner standing in the doorway, naked with a huge erection. I am sure he wants me and I now feel totally relaxed to take him. She moves off me and I lay back with my legs as wide apart as I can get them.

He moves to the bed and lies on top of me. His tongue pushes its way into my mouth and then I can feel his red-hot cock ease its way into my wet cunt. It stretches the flesh and completely fills my cavern. He starts to move out and then back in, slowly increasing the speed.

I think I’ve died and gone to heaven. I lift my legs and put them over his shoulders. He is so deep inside me, I think his cock will come out of my throat. He is moving faster and faster. “Don’t stop fucking me,” I pant. “I want all of you inside me!”

The feelings build and build until, with a shattering finality, I come. It is the most wonderful feeling I have ever experienced. I am panting and shouting that I want more. He is going faster still, until he erupts inside me, filling my cunt with so much cum that it cascades out of my cunt and into the crack of my arse.

I never knew that’s what it would be like. But I don’t think I will be so frigid next time I am in a car with a boy.