Cathy Burton stopped her brother, Carter, when he came home at nine o'clock. "Got a minute?" she asked, and led him down the hall and into her own bedroom. "I want to suck your cock."
"I thought you were mad at me," he said, feigning resistance.
"I was. I'm over it," was her reply. "Come on and get it out for me. Strip, boy."
Grinning, he complied, and soon they were both stripped and ready for action. Cathy had always liked her brother's cock. It was nice and straight and cleanly circumcised. About six and a half, seven inches. Not bad. Of course, Danny's cock was bigger. Her father's was, too.
For his part, Carter always felt that his sister was far more adventurous than he was. She was the one who suggested anal sex because she wanted to give it a trial run before allowing it on a date. Until then, he'd never penetrated her at all. They'd only ever masturbated together.
"There's my little friend," Cathy said, kneeling on her bedroom floor and lifting his hard rod so that she could lick at the balls hanging proud and heavy below. She sucked them into her mouth, juggling them with her tongue. "Let's see if we can get a little squirt out of you."
"We've never screwed before, Cathy," Carter said. "Seems like we should be more, I don't know, romantic I guess."
"We're not dating, you dope," she said, grinning up at him past his firm member. "We're just having fun. No romance in that, is there?"
"Guess not," he said, and stood watching his cock disappear over and over again in his sister's sliding mouth.
He was nearly ready to cum when she removed her mouth and said, "The Porters are fucking each other, too. You know, Danny and Elaine."
That was news. Carter couldn't picture them doing the incest bit. Of course, he wasn't really attracted to Elaine (all those freckles and wild red hair) and so he couldn't see her fucking anyone.
"Okay, but how does that affect me?"
"I think we should get together sometime. You know, have a party."
Carter didn't know how to respond right away so he just stood and watched as she returned her mouth to his cock, pumping her fist on him, too. A party was fine, but he hoped they would stick with their own sisters. He really didn't want to fuck Elaine Porter.
"You're going to make me cum too fast," he said then. "I won't be able to fuck you."
"You're not going to fuck me," she said. "You're going to eat me. Do I look like the kind of girl who fucks on the first date?"
She pumped his cock with long, confident strokes while circling the purple head over and over with her tongue until it swelled in her hand, twitching, and releasing a grand spurt of cum directly into her open mouth. She swallowed it happily, sucking him dry. Then she laid on the bed, saying, "Your turn."
As her brother put his mouth to her eager cunt, Cathy lay thinking of how her brother and father's cum tasted the same. Like father, like son.