Seducing My Sister/First BJ/The Doctor/Swimming/Suki

We are earlier than usual because Dad has to go somewhere after. We sit on a bench to get ready and a man comes in from the pool. He's not a teenager but he's younger than Dad and you can see his muscles. You look down to take your trainers off and when you look up, he's stripped off and is soaping himself in the shower right opposite. The two remarkable things about him were, the length of his cock and the fact that he had no hair anywhere on his body.

Suki's eyes are on stalks when she sees his monster cock hanging down halfway to his knees. He does have hair on his head, and he soaps that first, but there's none under his arms or between his legs. He uses his hands to soap the rest of his body. When he gets to his cock, he wraps it in a soapy hand and gives it a good clean, sliding it back and forth as it gets stiff. Dad has gone to the toilet, so Suki and you are staring, when the man spots us. Far from being embarrassed, he holds his stiff cock out for us to see. When Dad comes out, he turns to face the wall and it's pretty obvious that he's having a wank.

In the pool, Suki says that she could hardly believe that a willy could grow that big and asks if yours will get as big.

"I doubt it," you say. "You've seen other men in here and none of them are anywhere near it. I think he must be some kind of freak."

"Maybe it's cos he rubs it a lot," she says.

"Might be, but I think it's just how he's made, like some people are tall and some short."

"I s'pose. You rub yours. I hope you don't get that big."

You blush. "How does she know?"

"Come on kids, time we were going," Dad says

When we come out of the pool, Dad’s in a rush. You just have time to get your trunks off when Suki climbs up onto the bench and asks you to pull her costume down. Unsurprisingly, getting your hands on the soft cheeks of her bum and being so close to her pussy makes your cock instantly react. You quickly turn round, but when you get your shorts on you can see that Suki is grinning and you know that she caught sight of your stiffie.

“I written the phone numbers down, so if there’s a problem you can ring me first,” dad says. “I shouldn’t be more than an hour. Just don’t answer the door if anybody knocks.” This is the first time ever that we’ve been left in the house on our own. Dad made us peanut butter sandwiches for lunch, so we sit in the kitchen and eat them before going into the sitting-room and turning the TV on.

“Can I ask you something,” Suki says, sitting at the end of the couch with her legs tucked under her.

You shrug. “Of course you can.”

“Why do willies get stiff?”

”Now’s my chance to get her talking about sex.” you think.

• You tell her what little you've learnt from books
• Chicken out and suggest a game of cards