He licked and tenderly nibbled on the turgid bud for a moment, and then sucked the entirety of her nubile tit into his hot, wet mouth.
"Oooooooooh, Bobby!" she panted, pulling her nipple from his sucking mouth. "You're some tittie-sucker!"
"It's fun," the boy grinned.
"I know," she beamed, starting to unbutton his pajama top. "Now I want to play with you."
When she'd removed his top, she reached down for the tie cord on the bottom part of his pajamas, and was startled to feel a big hot sticky patch of fluid on the front of them.
"I shot off when I was suckin' your tit," he stammered when he saw the strange expression on her face.
"That's all right," Betty giggled. "It'll get hard again in a hurry."
"It already is," he grinned with pride.
Peeling down his pajamas, she quickly pulled them off over his legs. Her eyes popped wide open with surprise when she saw his hard boner. It wasn't as big as Scott's or her father's, but it was hard as a rock. She hadn't dreamed that her twin brother had such a nice big dick. Soft curls of blond cock hair were gleaming all around his pink balls. Trembling with excitement, Betty gently skimmed the soft foreskin up and down over his throbbing boner for several minutes.
"Do you want to feel my pussy?" she asked, removing her hand from his pecker.
"Shit, yes!" he grinned.
Grabbing the tie string of her pajama bottoms. Betty quickly removed them and sat back down next to her brother. The boy just stared at her juicy pink twat. He'd seen his big sister's hairy cunt from the top of the stain when Scott was finger-fucking her, but this was the first pussy he'd ever seen up close.
"Oh, shit," he gasped. "It looks all wet and slippery."
"It is," his sister giggled. "That's so a guy can get his cock in to fuck."
Looking at Bobby's excited face, Betty was again tenderly stroking his prick, pleased with the silky pinkness of his dong.
"Play with my twat," she whispered, lying back on the bed, spreading her thighs wide apart.
The boy sat ogling her wet open slit as her slippery hot pussy juices bubbled out from between her soft cuntlips. His cock was throbbing frantically as he knelt beside her on the bed.
"Touch it, Bobby," she panted. "Please play with my pussy."
His own dick momentarily forgotten, he nervously reached out and brushed his finger up along the inner flesh of he lust swollen slit while Betty moaned with delight.
"Ooooooooh, yes," she panted. "Keep playing with it."
Moving his finger up and down the length of her wet pussy lips, he could feel his sister trembling with delight.
"Ooooooh, Bobby!" she squealed when his finger contacted a hard node at the very top of her slit.
"What's that?" he gasped, quickly pulling his hand away.
"That's my clitty, dummy," she gasped. "What's a clitty?"
"That's a girl's prick," Betty explained. "Can you jack it off?"
"Of course, silly," she sighed. "That's how she climaxes."
He rubbed it again and again with a gentle rhythm, delighted at the way his pretty sister was moaning and writhing all over the bed.
"Do you like that?" the boy panted.
"Shit, yes," squealed Betty. "Now poke your finger into my pussy."
"All the way?"
"Yes, dummy," she sobbed. "All the way."
Betty let out a wild yelp as he rammed the full length of his middle finger up into the hot depths of her slippery cunt. The girl writhed around on the bed in total ecstasy as Bobby spent the next several moments plunging his finger in and out of the girl's naughty pussy.
"Okay, Bobby," she finally gasped. "Now let me play with your prick for awhile."
The thrill of playing with his sister's twat had given Bobby an aching hard-on. Grasping his throbbing cock, Betty gently stroked it while she fondled his cute pink balls.
"Look out," the teen splintered. "I'm gonna shoot!"
"Go ahead," giggled Betty, wanting to watch the cock-cream squirt out of his darling pecker.
Grinning, the naughty blonde continued stroking her brother's stiff dick until it spurted a wild stream of cum all over the sheets and her belly.
"I told you I was gonna shoot," the boy panted. "Now you got that shit all over you."
"I don't care." Betty giggled, scooping it up front her body and licking her fingers. "I like the stuff."
The boy just stared at his sister with disbelief in his eyes. "How can you like that sticky goo?"
"I dunno. I just like it," she answered. "Now if you'll play with my pussy same more, I'll make you hard again."
Within a matter of seconds, Bobby's plunging finger had his sister writhing all over the bed. She was squealing and bucking as the boy worked his finger deeper and faster into her foaming cunt.
"Oh, Bobby," she squealed with delight, "rub my clit! Rub my clitty!"
The boy's wet limp cock began to harden again from the excitement of watching his sister's wild passions as he fingered her hard clit.
"Ooooooooh, Bobby," she cried. "I'm coming, honey! Don't stop! I'M COMING!"
It actually frightened, the boy as he brought his sister to her screaming, lurching orgasm, and he remained scared to death until Betty finally assured him that everything was all right.
"Oh, thank you," she whispered a few moments later. "Now roll over on your back. I have a nice surprise for you."
"What are you gonna do?" he asked.
"I'm gonna suck your cock," she smiled as the boy turned over on his back.
"But it's all sticky with goo," the boy protested.
"That's neat," she giggled. "I'll lick it nice and clean for you."
Firmly holding the base of his shaft between her lingers, Betty lowered her mouth down toward his swollen cockhead. The girl was so happy her father had taught her how to suck a dick off. The texture felt so exciting as she lightly brushed her half-opened lips across his sensitive knob. Her hot tongue snaked out, lightly flicking against his hard male flesh. Swirling her tongue around the end of his swollen cockhead, she could feel her brother's body trembling with excitement.
Smiling up at her brother's passion-etched face she began running her wet tongue up and down the length of his deliciously hard boner. She could feel his prick swelling and throbbing as she teased her naughty tongue up and down around his bright pink knob. Then slowly lowering her lips, she took the whole of his cockhead into the moist warmth of her sucking mouth.
"Aw, shit," Bobby panted excitedly, staring down at his stiff shaft buried between the baby-soft lips of his blonde sister.
"D'ya like this?" she whispered, temporarily removing his prick from her mouth.
"Christ, yes! It's far out!" he gulped, clutching at the sheets.
With his stiff cock thrusting wildly in the air, Betty could feel it jumping in her grasping fingers as she again began lapping and licking his prick with her hot tongue.
Betty ran her tongue up and down the entire length of the squirming his pecker, soaking it from tip to base until it was glistening with her sweet wet spit.
Reaching up under his stiff shaft, Betty tenderly cupped his balls in her hand, and lowering her lips, she sucked them gently into her mouth. Delicately sucking his balls, she greedily tongue-washed the crinkly pink skin of his nut-sac.
Staring down, the boy could see his sister's long blonde hair brushing over his thighs, her pretty face buried deep between his trembling legs. The only sound in the room was the wet, smacking sound of Betty's slippery lips and tongue sucking and slurping on his quivering rod and balls.
The two teens were having such a ball, they had forgotten all about their older sister who was downstairs bidding Scott good night.
"I wish you would let me stay a longer," Scott whispered, kissing her good night by the door.
"No, darling," she smiled. "You must leave. I just don't trust myself any longer. Please try to understand."