TBaby/Jason/Smith/Alice&Trevor/Sex

"We only did it once," Trevor says.

You asked them how long they've been fucking and they told you a tale about how they were on holiday, found a porn mag and started copying what the people in the pictures were doing. They tried oral sex, even a sixty-nine, but although Trevor had actually managed to get his cock into his sister's cunny, it had not been a very successful experiment and now they were keen to try again.

You're only a little more experienced than they are, but they don't know that and you have read quite a lot of books and even looked at some videos. "Maybe I could help," you say.

Alice looks at her brother and then back at you. "How do you mean," she asks.

"Maybe you and I could do it and Trevor could watch," you say.

Alice giggles. "That's not fair," Trevor says.

"It is fair, I'm older than you. You can have a go after me," you say.

"For fuck's sake," Alice says and she catches hold of the hem of her nightie, strips it up over her head and lays back on the bed. "When you boys are finished arguing…" She says.

You take a few seconds to look at her beautiful brown body. Her chest has no more than a suggestion of the tits to come and her flat belly with its neat belly button leads down to the swell of her mound and the neat split of her hairless pussy. You ignore Trevor and lean over to kiss her nipples, making them stand up and then get up onto the bed and spread her legs so that you can look at her pussy properly.

You've seen plenty of pictures, but they were mostly of older women and as you lean in to taste this vision of perfection, you can't help thinking that little girls are by far the best. As you press your lips against it she lifts her knees and spreads her legs to give you better access. You use your tongue, trying to push it into her vagina, and you suck on her stiff little clit.

"Come on, get on with it," Trevor says impatiently.

You get up on your knees and see that Trevor is standing and holding his stiff cock as he watches. You pull your shorts down, revealing your own rock hard cock and shuffle forward. When you get the tip in place between the lips of her vagina, you look up at her face and see that she is biting her bottom lip. "Ready," you say, but it's more of a warning than a question.

At first, all you can feel is pressure, but then it's as if something gives and the head of your cock is being squeezed by the vice-like grip of her velvet tunnel. You feel your balls begin to clench but you want to make it last as long as you can, so you freeze with over half of your cock buried in the young girl's almost-virgin cunny.

Alice has her eyes shut and she is breathing hard through her mouth. Trevor is stroking his stiff cock and watching intently as you begin to fuck his sister. Once that first impulse has subsided, you find that you're able to start sliding it in and out without risking a premature climax. You feel Alice's heels drumming against your bum and realise that she's wrapped her legs around you as if she's trying to pull you in even further.

You do your best, pushing forward until you feel your balls being squashed between your two bodies and you realise that she's taken the whole of your cock. She starts making incoherent moaning noises and, at the same time, you feel her hips bucking underneath you and her internal muscles squeezing and you realise that she is having her own climax. There's no holding back now and you thrust in as hard as you can as your balls pump their contents deep inside her.

"Are you finished," Trevor says impatiently.

You pull your softening cock out slowly, aware that you're going to leave a pool of spunk on her sheet and then Trevor pushes you over and you lay on your side as he takes your place.

• Trevor takes the initiative
• xxx