TVR/Andrew2/Bath/Bed/Incest/Surprise/Tell/Saturday/Spying/Susan/Anatomy

You sit on the end of the bed looking at the two girls and wondering what’s going to happen next. Susan rolls on her side and whispers something into Janet’s ear that makes her giggle, then she sits up and pulls her skirt down over her knees. “Janet and I are going to teach you about girls. Well, I’m going to teach you and Janet’s going to be my model.” She turns to Janet. “It’s time for you to get naked,” she says.

Once she’s stripped off, she lays on her back in the middle of the bed. “Sit next to her,” Susan says, and you sit up on the edge of the bed looking at your naked sister, while Susan sits down by her feet. “Right,” Susan says. “I want you to pay close attention to Janet’s tits. Just because she hasn’t got any boobs yet, doesn’t mean they’re not sensitive. If you put your hand on her chest, you’ll be able to feel where they’re going to be. Cup your hand underneath and squeeze gently. That’s it, now catch her nipple between your finger and thumb. Gently now.”

You do as you’re told and you feel your sisters little pink nipple getting hard. Then you transfer to the other side and make that one hard as well. “Now I want you to suck them,” Susan says. “Not too hard and No Biting, try and imagine you’re a baby sucking on your mother’s teat.” You lean across and start sucking, first one side then the other. Janet seems to be trying to suppress her giggles, but you know that she is enjoying the experience.

“Now you can work your way down to her pussy,” Susan says. You reach out to get hold of Janet’s legs, but Susan stops you. “Don’t be so impatient, the objective is to arouse her so much so that all she can think about is how much she wants your cock. Most boys only think tits and pussy, but at this point the whole of your sister’s skin is one big erotic zone.” When you start kissing Janet’s tummy and your tongue finds her belly button, you feel her squirm and realise what effect it’s having on her. You slowly work your way down and then, when you get to her mound, Susan tells you to move down to her thighs. You start at her knees, spreading her legs wide apart so that you can kiss the inside of her thighs and gradually work your way up to her pussy.

“Right. Stop there for a minute.” Susan pushes you to one side and points at Janet’s pussy. “Pussy is one of the nicer names for a vagina, but there are a lot of others. Cunt, fanny, twat, slit, snatch, fuck-hole, muff are just a few that come to mind. There are three important parts: the vagina which is the hole you been sticking your cock in and also where babies come out, the urethra, which is where the wee comes out and the clitoris.” As she’s talking she reaches out with both hands and uses her thumbs to part Janet’s pussy lips. “The clit is the most sensitive part.” She moves her thumb up to Janet’s little bump, making her jump. “If you look closely,” she pulls you in closer with her free hand, “you can see that it’s like a tiny little cock.” She demonstrates by pulling the hood back just like you pull the foreskin back off your knob-end.

“When you get to work on a pussy, you should suck it like an orange. Use your lips and your tongue and even your teeth if you’re very gentle and you will soon have her wanting more.” You do as you’re told, and soon Janet's pushing back at you and her thighs are clamped firmly against your ears as she climaxes. You keep going, sucking her juices out and working your tongue as far into her vagina as you can before she pushes you off.

You sit up and look at her, all flushed and giggly. "You haven't finished yet." Susan says, and both you and Janet look at her, puzzled. "Turn over," she orders and Janet rolls over onto her tummy. Susan slips a pillow under her hips which makes her bum stick up. "Isn't that a beautiful sight," she says, and you heartily agree as you look at the twin mounds of your sister's bum.

"I want you to give her a smack." Janet doesn't like the sound of that and tries to get up, but Susan has her hand in the middle of her back, holding her down. "Not a hard smack. more like when you pat a dog," Susan says. "Harder than that. That's it, you want to leave a hand print but not hurt her. Now I want yo to spread her bum cheeks apart so that you can see her bum hole."

Janet's anus is a barely visible starfish and when, acting on instructions, you lean over to tease it with your tongue, she nearly gets away from you. "You have to forget any ideas about whats 'dirty'. When you are fucking, anything goes, so long as neither of you objects and you should only object if it hurts too much," Susan lectures. When you look up, you see that she has the vibrator firmly buried in her pussy.

After your lesson, you get your reward and with Janet sitting on your stiff cock and Susan straddling your face, it doesn't take very long before you are squirting yet another load into your sister's cunt.

• Susan’s turn