Even though they were alone, Warren spoke in hushed tones, his lips tickling the shell of his 18-year-old sister's ear.
"So, little girl, you want to become–what did you call it?–a 'world-class fuck,' hmm? I don't know about the world class part, but if you're sure you want to learn, I'll be more than happy to be your tutor," he said, kissing her neck lightly. "Are you sure that's what you want? Do you want to be your brother's lover? His sex toy? Do you want your brother's cock in you? Are you willing to do whatever your big brother tells you to do? Are you willing to put your absolute trust in me, Candace?" Warren asked, his hands stroking his sister's nubile body.
Candace turned to face her brother, looking deeply into his eyes.
"Ohmigod, Warren, that's exactly what I want. I want you to teach me everything you know. What you don't know, I want us to learn together. I'll do whatever you tell me, big brother. I promise." Her breath was coming in gasps, not from the exertion of the orgasm her brother had just given her, but from excitement as she realized that her fantasy was going to come to life, that her big brother was going to become her lover.
Warren stood up, water cascading from his body in a rush. Taking her hands in his, he pulled Candace up with him. "C'mon, little sister, it's time to go to bed."
He led her back into the house through the family room, through the kitchen, past their parents' suite on the east side of the house, up the staircase and down to their bedrooms on the west side of the second floor.
Their father, a reasonably successful architect, had designed their home with a nod toward privacy for he and his wife. Warren and Candace's generously sized rooms had been placed as far from their parents' as possible. Brother and sister shared a connecting bathroom, which, only a few years earlier, had been the stage of some serious battles as each jockeyed for prime grooming time. The bathroom was unusual only because there was no door opening to the hallway. Since it was located in the "family wing" as their father described it, it was rarely used by anyone else, and the lack of a third door added valuable usable floor space.
Warren led his sister into his bedroom, and gestured for her to sit at the foot of his bed. Both of them were still naked; he stood before her, his hands on his hips, feet spread shoulder's width apart.
"Mom and dad will be gone for at least two weeks," he began, "Possibly longer if the weather holds. That will give us plenty of time to play. You're going to have to go on the Pill," he continued. "I can probably get you an appointment with Lisa's doctor tomorrow. Once you get your first prescription filled, we can order refills from an on-line pharmacy. Until you've been taking it for about a week, I can't fuck your pussy."
He smiled at Candace's crestfallen expression.
"Oh, don't worry, little sister. Trust me, there's plenty of things we can do in the meantime. I'm going to set a few ground rules. Until mom and dad get back, you're going to sleep in my bed every night. Do you understand, little girl?"
"I understand," Candace said softly.
"Until they come home, and after that whenever the two of us are home alone, you are going to be naked, including when you're in the back yard. I may or may not decide to wear something, but you're going to be nude. Do you understand?"
Blushing, Candace replied, "I understand."
"From now on, you and I will shower together, unless its absolutely impossible. Mom and Dad never come up here in the morning unless one of us hasn't shown up for breakfast–they won't know the difference. Do you understand?"
"Yes, I understand."
"Tomorrow I'm going to start teaching you how to jerk me off. I'm also going to teach you how to suck cock. Starting tomorrow, you will give me either a blow job or a hand job every morning. Do you understand, little girl?"
Her eyes shining, Candace replied, "I understand, Warren."
"I'll probably think of a few more rules as we go along," Warren told his sister. "But that's enough for now. And, don't worry, little one, I'm going to bring you pleasure, too. I'm going to explore your body and learn what you like. I'm going to fuck you whenever you want. I'm going to eat you out for hours if that's what you want. I want you to share your fantasies with me–all of them–and I'll do whatever I can to make them come true. Okay, Candace?"
"OKAY!" Candace squealed, standing up from the foot of his bed and wrapping her arms around her brother's shoulders. Placing both hands on the back of his head, she brought his face down to hers and kissed him passionately.
Returning the kiss with equal passion, Warren's arms encircled his young sister's body, pulling her against him. His hands moved lightly over her back, his fingers tickling her with a gentle but insistent caress. Moving lower, he cupped the full globes of her ass in his hands. Dancing to nonexistent music, he turned Candace until he could see their reflection in the full-length mirror. His fingers moved to the cleft of his baby sister's ass, and he pulled the plump cheeks apart, gazing intently at her pink rosebud.
"Candace?" he whispered into her ear. "Did you like it tonight when I fingerfucked your asshole?"
"Ohhhhh yeeeees, Warren, I loved it," she replied.
"Really?"
"Yes, really, Warren."
"I'm so glad. Especially because since I can't fuck your pussy, I'm going to take your ass tonight."
"What!!!" Candace pulled away from her brother, surprised.
"That's right, little sister. Of course, if you don't want to, maybe you're not really ready to learn how to fuck after all."
"No, it's not that. I just didn't think... I mean, I thought that would come later."
"No, if you really want us to be lovers, if you're serious about this, then you need to give me your ass tonight. If not, then we can just forget that tonight's little session in the pool ever happened, and I won't bring it up again."