Her heated yelling was suddenly muffled by the thick plug of Whit's cock. The wet sounds smacked through the car. He began to grind his teeth and groan in earnest.
Monica saw his lips draw back in a grimace of blissful agony. She watched his hips fuck upward and drive his cock all the way into Carla's open throat.
She felt Carla's hips shudder and shake and her ass tremble. Her fingers were sucked deeply into the holes in her charged body, and the muscles of her crotch squeezed spasmodically around them.
"Ahhhhgh!" Whit growled suddenly. "Here it comes, baby! All my big wad! Suck it down! Drink it! Here it – oh! Yaaaaagh!"
His prick exploded. The head swelled in her soft, clamping, sliding throat. Her lips compressed around the root of his stalk and nearly stopped the boiling, hosing spurt of his cum.
The hot wads shot from the end of his prick and bathed the inside of her mouth and tongue and throat, making all of it incredibly slippery and sensitive to his flaming cock.
He yelled again and shot another stream into her mouth. There was a wet sound, and sperm spurted from between her compressed lips and the throbbing root of his prick and spattered his pants.
Monica saw it all and heard it all, watching her brother come violently, seeing the gleam of sperm as it dripped from Carla's sucking lips.
Then she heard Carla groan. She felt the girl's ass shake wildly. Juice flooded her fingers as the silky sheath of her spasming pussy poured forth her slippery honey.
Carla's hot asshole sucked and pulled at her imbedded thumb, drawing it even deeper. Monica's excitement grew to the point she nearly came herself.
It was thrilling to feel a girl's pussy spasm with orgasm around her fingers. It was thrilling to know that she'd made another person reach a climax – that she had been the cause of it.
Feeling Carla come under the wriggling touches of her fingers was nearly as thrilling to her as feeling Burke's trembling prick spurt hot sperm over her belly, and she suddenly wanted it all to happen to her.
She wanted to feel a big cock up her pussy. She wanted to know that her slippery, sweet sheath had made that cock come. She wanted to feel what it was like to be able to suck one off and know that the final flick of her tongue or her lips had made the prick tremble and spurt with orgasm.
She wanted it all, and her heat was so intense she knew she'd let Carla do anything to her the girl wanted to do.
The car's front wheel bumped off the edge of the road, and there was the sound of brush scraping along the underside of it. Whit opened his eyes and stopped shuddering long enough to stop the crawling vehicle. He took it out of gear and shivered a final time and sighed heavily, settling back into the seat.
"God, damn!" he gasped. "That was wild! That was flying!" He cupped his hand around Carla's head. "Baby, you can really suck cock!"
She moaned and lifted her head. She licked her lips and swallowed several times, giving a final shudder with her ass.
"Ohhhhhh, that sister of yours is a sweetie!" she cried. "She fucked my ass and my pussy both, and I thought I was going to blow my mind!"
Whit looked over at his sister and grinned, letting his prick gleam wetly in the light and sag over to the side. Monica looked back and realized suddenly that she still had her fingers up Carla's body.
She pulled them out. Her thumb made a farting sound as she sucked it from the grasping asshole. She held her drenched hand awkwardly.
"Oh, God," she said softly.
Carla turned around, bumping her head once but not minding it. "Now it's your turn, honey," she cried.
She reached for Monica's thighs. Her hands ran along them, scooping the hem of her dress back, revealing the yellow triangle of her panties over her crotch.
Whit stared at his sister's pussy and licked his lips with a soft moan. "Yeah," he breathed.
"Oh, Whit – don't watch! Don't look at my pussy!" Monica cried.
"Suck her off, baby," he said to Carla. "Give her a good one."
"Oh, God…" Monica gasped, trembling wildly, her emotions spinning.
She felt the fingers reach for the waist of her panties. She couldn't keep herself from lifting her butt up from the seat to help. Carla worked the panties down over the round, trembling cheeks of Monica's ass. They rolled down her thighs and off her feet. Then Carla was between her spread knees, and Monica knew her pussy was bare and open and sweltering with cunt honey.
And she knew that her brother was leaning forward to stare right between her thighs.
"No! No, don't…" she gasped wildly, trying to close her knees.
Carla's fingertip slithered through the damp folds of her puffy cunt gap and made electric sparks shoot through her body.
"Ah! Ohhhhh, don't…" she wailed, suddenly changing her mind. Burke was the only one who should be doing this to her, the only one who should be looking at her naked pussy and touching it and thrilling her.