Settled in Joe's car, they drove out of the parking lot and headed back to Helen's house.
While the rolled down the street, Helen slid over next to Joe and began to stroke his leg.
"You keep that up, and I'm liable to have an accident," he said, his voice hoarse.
"I owe you," Helen whispered, stroking his already-stirring cock. "I owe you big time." She loved how his organ grew and swelled as she teased it through the fabric of his slacks. She unzipped his pants, reached inside them, and took the swollen lance in her hand.
"My God, woman!" Joe gulped, "Do you have any idea what you're doing to me?"
"From the feel of things, I'd say I'm turning you on," Helen replied calmly.
"How...how am I supposed to drive?" Joe croaked.
"You could always park somewhere," Helen told him.
"Here?" Joe asked, "In the middle of town?
"That's your problem," Helen said. She finished pulling his erection out of his pants. She almost giggled. It looked obscene sticking out from his fully-clothed body. She began to stroke it gently and could feel it throbbing.
They approached a rest area. Joe pulled in, parked near the back, and shut off the engine. "I sure as hell hope none of the patrol units swing through here tonight," he gasped while Helen's hand continue rubbing up and down on his shaft.
Helen used Joe's erection as a handle and urged him to turn toward her. After he did, she bent down and licked the florid, arrow-shaped tip of his cock, tasting the salty, acrid taste of his excitement.
"Ohhhhh!!!" Joe exclaimed, thrusting his hips forward, trying to get Helen to take more of him in her mouth.
"I can't believe I'm doing this!" Helen thought as Joe's massive, swollen wand slid between her lips. "Here I am, in a highway rest area, giving a blow job to a man I only met today."
She didn't care. She wanted to give Joe as much pleasure as he'd given her. She took as much of him as she could in her mouth, then began to move her head up and down, fucking him with her mouth. Her hands cupped and fondled his balls. She could hear the big man's gasps and moans of pleasure and could feel his body shaking. Delighted, she kept on doing what she was doing.
"Ohhhhh!!!" Joe cried, "Jesus, Helen, that's incredible!!!!! My God!!!! Please!!! Please!!! Don't stop!!!!! Don't stop!!!!"
Lights swept through the their car as other cars entered and left the rest area. The chance of being discovered here was probably just as high as it had been in the restaurant. Helen slid one hand under her skirt, into her panties, and began caressing her vagina and clit. Soon she, too, was shaking with excitement.
"Ahhhhh!!!! Ahhhhh!!!" Joe groaned as his hot fluids jetted into Helen's mouth. "Ohhhhh!!!!! Ohhhhh!!!!" His penis throbbed and jerked.
Helen swallowed as fast as she could, but felt some of his juices oozing out of her mouth. "Mmmmmmpphhhh!!!! Mmmmmmpphhhh!!!" she moaned around his shaft as her orgasm, brought on by a combination of contact with him and her own stimulation of her body, swept through her, filling her with the sparkling, dancing electricity of passion.
Hungrily, she licked and sucked every drop of his juices she could get and Joe responded with continued moans and gasps. Finally, she allowed his now-limp cock to slide from her mouth. Picking it up gently, she planted a soft kiss on the tip, then she tucked it back inside his pants and sat back on her heels, looked up at him, and smiled.
Joe lay sprawled on the car seat, looking spent, his once-neat three-piece suit wrinkled, his pants unzipped. His face was beaded with sweat, and his chest heaved.
"There!" Helen said, "Now we're even."
Joe pulled himself behind the steering wheel, zipped up his pants, and looked at Helen, who'd gotten back up on the seat. "You think so?" he said. "Wait until we get back to the house."