Seducing My Sister/First BJ/The Doctor/Swimming/Suki/Yes/Story/Yes/Downstairs/Mum/Dad

Dad's new job meant that he got a new car, a Jaguar with leather seats and lots of gadgets. When he starts it up in the morning it sounds all rattly like a taxi, but once it gets going it purrs like a proper Jaguar. He bought a new suitcase as well and you help him put it in the boot. He still using his old briefcase though because mum bought it for him when he got his first promotion. "It's only a couple of nights," Mum says, but you can tell that she isn't very happy about it.

When you get home from school you change into shorts and a loose shirt before dinner. It's cottage pie today, made from Sunday's leftovers and tinned fruit and custard for pudding. Afterwards, Mum waits half an hour and then sends Suki up for a bath. You sit with Mum watching TV until you hear Suki coming out.

"I'll see to her," you say and trot upstairs.

She goes over and sits in front of her dressing table wrapped in a bath towel and gives you the hairbrush. You always enjoy brushing your little sister's hair. You start with the ends, carefully using the brush to get the tangles out and then working up until you can run the brush all the way from top to bottom. Her hair is long reaches down to her waist, well where her waist would be if she had one and while you're brushing it, she lets go of the towel.

When you've finished brushing, you get an idea. Her pyjamas are still in a heap on the floor where she left them this morning, so you catch hold of her hand before she can say anything you've led her across to her bed and popped her under the duvet, still naked. "Hey! What about my pyjamas," she says.

"It's too hot for pyjamas, let's just get on with the story," you say. You slip your shorts off and slide under the duvet next to her. Now you are pressed against her naked body with one arm around her and the other holding the book. "Did you think about the other night," you ask.

She giggles. "Is it stiff again?"

"So stiff it hurts a bit," you say. "Do you want to see?"

She gives a little shrug, but lets you put the book aside and push the duvet down. "Do yo want to try a proper kiss," you ask. She nods nervously and you screw round to kiss her on the lips. "This is a bit awkward," you say after a few moments. Without asking, you lift her on top of you.

Now you can kiss properly and she seems to enjoy the experience. For you, being able to send your hands roaming freely over her young body is even better than the kiss. You can easily reach her soft bum cheeks and then send an exploratory finger down between her thighs. "Hey!" she says, breaking off the kiss, but staying stretched out on top of you. "Why are you touching my bum?"

"Well, you touched my willy."

She giggles. You stretch out and press your finger right on her pussy, searching for her clit. When she tenses up and tries to get off, you know you found it. "You're squashing me," you say. "Move up a bit." You slide her up and then fish your cock out so it's pointing up between her legs. "That's better."

She lays still for a while and you wriggle her down, so, as far as you can tell, your stiff cock is pressing against her pussy. What you really want to do is to throw her on her back and ram it into her, but you know that you must take your time. The feeling of her thighs squeezing you is pretty nice, and when yo start lifting her up and down it only takes a moment before you are cumming.

"Eww! What's that," she says, jumping off. "Did you pee on me?"

"Sorry. No, it's not pee, it's semen. That's the stuff that a boy makes when he gets excited."

She grabs a tissue and wipes her bum, then sniffs it. "Okay, it doesn't smell like pee, but it's pretty yuck." She slips off the bed, grabs her pyjamas and goes across to the bathroom. You make yourself respectable and tidy her bed up. When she comes back and gets in, you lean over and give her a kiss.

• Kissing practice