Roberta was slipping to her knees, kissing her brother's bare chest and muscle-ridged stomach. Amy wished they'd move a little bit, because her brother was bare-assed and she wanted to see his prick!
Roberta was on her knees, now. Her hands were working between Les' thighs, and her head was moving around and about in the vicinity of his cock. Amy was sure Roberta was licking and sucking her brother's prick – and she wanted to see!
"No – don't stop that," Les gasped. Roberta's head bobbed back and forth a few times. Amy clearly heard the sound of wet cock-sucking and saw her brother tremble with pleasure. Then Roberta was standing and pushing Les back towards the big waterbed.
"Kid?" Roberta said. "Hah! All day long, men were trying to get close to her and pick her up and…"
"You keep them away from my little sister!" Les snapped – and then groaned. He'd lain back on the bed, and Roberta was kissing and licking her way up the insides of his long legs. Her firm, ripe ass was waving voluptuously in the air.
Roberta shifted to kiss Les' balls, and Amy saw his cock. She felt her pussy juicing up as she gazed at it. It was beautifully formed – and huge, the biggest she'd ever seen!
"She's a beautiful young woman, Les," Roberta was whispering between licks and sucks at Les' ball. "She's no kid."
"Ahhh – yes, suck my balls!" he groaned – and then Amy was stunned as she heard her brother say, "You're right – she is beautiful… and sexy as hell. But that's all the more reason why we have to – ahhh! Yeah! Suck 'em, woman!"
Amy listened to the slurping – and then to Roberta saying, "I know you know it, Les. I saw that hard-on you had when you saw her come out of the bathroom in those tight pajamas! She turns you on, doesn't she?" Her hand was gripping his cock shaft and moving up and down. "Admit it – if she weren't your sister…"
"Oh, cripes…" Les moaned. "Shut up, and suck cock!"
Roberta obliged for long minutes, her head bouncing up and down, her lips lightly skimming the thick shaft of his cock – and then suddenly tightening as her cheeks concaved. She was sucking his cocktip for all she was worth – and that was plenty!
She freed the thick cocktip with a loud popping sound, and then resumed the conversation. "Yes, but if she wasn't your sister, if she was just a girl you met on the street…"
"She'd still be just a kid!"
"But what a kid! With that gorgeous body of hers! And that hair! And think about that sweet, young, virginal pussy, with hardly any hair at all! Wouldn't you just love to teach her all about sex and fucking and sucking…"
"Yes! She's so lovely and sexy and innocent all at once – but she is my…"
"Pretend she isn't!" Roberta urged, pausing to take a long, loving lick at his balls. "Pretend she isn't and she's working on your big, beautiful prick now, that she's never done this before – and…"
"Stop it!" Les groaned. "I'm going to cum!"
And Amy, watching, was working her hand down inside her pajama bottoms to rub and caress her own dripping, throbbing pussy. As Roberta spoke to Les, Amy was picturing exactly the same things: that it was indeed, herself, licking and sucking and jerking off her brother's cock!
"Good!" Roberta whispered, hand flying faster on Les' heavy cock. His prick was too thick for her to completely close her fingers around it. "Good! Cum in my mouth! I want to drink it!" She sucked furiously, then swallowed fully half of his big cock. "I want you to pretend you're cumming in her mouth because it turns you on!"
"Yes! Uh – yes! It turns me on – Uh!" He made the admission, and then arched up on the bed as Roberta fastened her leeching lips over his cock and sucked him past the brink.
Amy pushed one finger all the way up into her own steaming cunt, grinding her palm flat against her clitoris. She was going to cum, too! Watching Roberta's throat convulse around the thick stem of her brother's cock as she drank the creamy jism, she imagined that it was her own mouth taking Les' abundant eruption, that his juice was drenching her throat and stomach. It was driving Amy to her fastest orgasm ever!
"Yes! Yes! Take it Amy! Take it all!" Les grunted, his hands grasping the sides of Roberta's head and jerking her up and down on his spasming prick. He unloaded his ample supply of hot jism into her welcoming throat.
Amy's legs went weak as the rush of her own orgasm passed through her. She could hardly keep her balance!
Amy grasped the edge of the door frame to steady herself. She was suddenly cramping, but she did not want to miss watching as Roberta licked the long, limber length of her brother's still awesome prick.
"See?" Roberta cooed, arranging herself on the bed next to Les. "It does turn you on, doesn't it?"
"Shut up," Les whispered. "I don't want to talk about it again – ever."
Roberta ran her hand over Les' broad, powerfully muscled chest. "You're overreacting because it did turn you on – and it's only natural. She is beautiful and sexy and you do care about her. After all – she's your sister."
"Shut up. If you talk about it again, I'll fuck your ass!"
"Ummmmm," Roberta hummed. "I might be in the mood for that. We almost got it all the way in, last time." Her hand found Les' prick and felt a sudden renewed swell of blood in it. "You might even be able to get it up pretty fast again. Why, that turns you on almost as much as pretending your sister was sucking your cock, doesn't it?"
His big prick and his moan answered her.
"And if you were to pretend you were fucking Amy's sweet, round little ass…"
"Stop it! Damn you, vixen!" Les growled.
Amy shivered at the idea. She'd tried ass-fucking once, and it had almost killed her. And her brother's prick…!
"Okay, okay," Roberta murmured, arraying herself so that one tit was crushed against Les' chest. "Okay. Maybe tomorrow night…"
Les' hand stilled on Roberta's ripe, round ass and Amy knew the night's show was over. Returning to the lonely bed, her pussy aching for more, she knew there'd be plenty of reruns on the insides of her eyelids before she slept.
"Sleep well, Sis?" Les asked.
The three of them sat at the breakfast table. Amy was still wearing the pajamas. She enjoyed her brother's furtive glances.
"Mostly. Something woke me up last night…"
Les blushed, then paled.
"… but I didn't have any trouble getting back to sleep."
A look of understanding flashed between Roberta and Amy. "Well," the lovely brunette said, "all of the excitement and then being in a strange place – it's natural that any little sound would wake you up."
"That's what I figured when I turned over… and went back to sleep."
"Oh, sure, well, uh, I hope you're going to enjoy yourself while you're here," Les managed to stammer.
"I'm sure I will," Amy cooed. "But I feel bad about it."
"Why?" Roberta asked.
Amy reached for the orange juice, knowing that the movement opened the space between the top two buttons of her pajamas, giving Les a tantalizing view of her creamy tit.
"I feel like the third wheel on the cart. You guys have to drag me everywhere, and – well, I feel like I'm cramping you."
"Well, don't you worry about that," Roberta began. The telephone jangled. Les excused himself to answer it in the next room. Roberta leaned close to Amy. "You saw us last night?"
Amy nodded and giggled. "And heard you."
"Listen, I have a plan."
"What?"
"Can't explain now, but don't be surprised at what I, uh, 'accidentally' let slip next."
"What is it?"
"I'm going to let it slip that your brother and I go to swingers' clubs. But you act unsurprised, got it?"
"Sure but…"
"Shhh! Here he comes."
Les sat at the table again. "Bad news. I might have to go into the office tomorrow. Something came up, but it's the only thing that can interrupt the vacation."