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

The following Saturday morning Susan arrived with her overnight things in a back-pack as if she was going hiking.

“Hi Susan.” You answer the door and look at your sister’s friend with renewed curiosity. She is shorter than Janet but nowhere near as skinny, in fact, she looks as if she is getting a bit fat. Her blonde hair is tied back in a ponytail and she is wearing a short dress and its stretched tightly across her chest so that you can see the twin mounds of her developing breasts pushing it out.

“Hello, Andrew.” She grins wickedly at you. “I hear you and Janet have been playing some interesting games.”

You blush and look round quickly to see if anyone else can hear. You know your father is in his study, and mother is in her bedroom, but Mrs Johnson could be anywhere. Relieved to find no one around to ask what those “interesting games” might be, you take her bag and follow her upstairs to Janet's room.

You follow the chubby young girl up the stairs, and you can see right up her skirt, which makes your cock hard. You know that the plan is for you to have sex with her, but you're not entirely convinced it's going to happen. And anyway, with Mrs Johnson around, it would be far too risky to start anything now.

The morning drags by. The girls are in Janet's bedroom, and you stuck your head in, they told you to Go Away. Your cock is still stiff so you go into the bathroom and use your hand to relieve the pressure. Eventually, Mrs Johnson calls you all down for lunch and you sit around the table in the kitchen to eat.

Mrs Johnson is quite stout you can't help noticing how her tits bounce up and down as she moves around and it almost seems as if she wants you to see when she bends down to give you something and you get a good look down her cleavage. After lunch, Mrs Johnson will go home, and your parents are both going out and won't be back until teatime, which means that you have the house to themselves for at least three hours.

"Maybe they changed their mind," you think when the girls go up and shut themselves back in Janet's bedroom. Disappointed, but not all that surprised, you go back to your own room to find something to do to take your mind off it. Then there is a knock on the door. “We need your help with something,” Janet says. You are trying to glue a tricky bit on to a model aeroplane and look up to see your sister. “What,” you say in an annoyed voice.

Janet giggles. “Come and see.”

You carefully put the model down and follow your sister into her bedroom. Susan is sitting at the dressing table peering at something in her hand. “It doesn’t work,” she says. ‘It’ is a cream coloured plastic tube about eight inches long with a blunt point at one end and a screw cap on the other. The cap is off and you can see there is a battery inside.

“What is it?”

“You’ll see” Susan replied, "if you can get it to work." She holds the object out and you take it from her.

“What’s it supposed to do?"

“It just buzzes." For some reason this makes the girls burst out into fits of giggles.

You sit down on a chair and examine the thing. The battery seems to be the right way round but, when you look closely, you can see that the metal spring thing that is supposed to contact one end of the battery is bent flat. You borrow a nail file and prise it back into position. When you screw the cap back on and it starts buzzing and vibrating in your hand, you drop it on the floor with surprise and the girls roll about laughing at you.

“Well it's working," you say, “but I still don't see what it's for."

Still giggling, Susan picks it up. “Shall we show him, Janet?"

“Sit there and don’t move” Susan orders, then she turns to Janet. "Pull your skirt up and sit on the edge of the bed," she says. Janet does as she's told and you can see that she isn't wearing any knickers. "Spread your legs apart," Susan orders and when Janet does, you have a perfect view of her pussy.

Susan takes the buzzing plastic tube and puts it between Janet's legs, and it dawns on you what the device was designed for. “Where did you get it,” you ask.

Janet is biting her lip as her friend strokes the buzzing toy up and down her slit. “Uncle Jim gave it to me,” Susan says. “Look at your sister.” Janet’s whole body is blushing bright red, her head thrown back and her eyes closed. Her hips are bucking up and down as Susan slide the vibrating tube up and down her slit. “I love to watch her orgasm, and she cums so easily.”

When she's calmed down, Janet flops back on the bed. “Do you want to do me," Susan says with a grin, looking straight at you. You stand up, aware that your stiff cock is pushing out the front of your shorts. "Budge over a bit," Susan says and Janet wriggles over near the wall. Susan gets right up on the bed beside her and when she pulls her skirt up, you see that she too has lost her knickers.

You pick up the gadget and twist the end to start it buzzing again. As you hold it against Susan’s chubby pussy you can't help comparing her with your sister. Janet's pussy is much thinner than Susan's and she has no hair at all, while Susan has a light fuzz of hair on the mound just above her pussy.

“Suck it to make it wet” Susan orders.

You do as you're told, and you can taste Janet when you put it in your mouth. Then you slip the tip of the wet gadget into the entrance of her vagina. She lets her legs flop wide apart allowing you easy access and you gently push it further and further in until a good four inches is buried inside. You look at her face and saw that she has pulled a pillow under her head and is watching you with wide-open eyes.

“Am I doing it right?”

“Yes!” Susan’s voice sounds strained. “Press a little harder against the top where my clit is.” You adjust the angle, and seconds later, she clamps her knees together and once again you have the interesting experience of watching a young girl in the throes of an orgasm.

• An anatomy lesson