"You do?" Matt said, his eyes lighting up.
"Yeah," Terry grinned, "like this."
She went on playfully squeezing his prick through his jeans. Matt was definitely interested. He sure didn't ask her to stop. Pretty soon she felt his cock swelling and stiffening, till there was a big obscene lump at the fly of his pants. He was watching her with hot interest.
"Like it?" She smiled.
"Yeah," he said, his voice a little husky with arousal. "What else do you do with your boyfriend when you're at the movies?"
"Kiss," Terri said. "Have you ever kissed a girl, Matt?"
"Naw," he sighed, "it's just too much of a hassle to date. You know how Mom and Dad are. If I asked a girl out, they'd have to come along. I figure I'll just have to put off sex till I get away to college."
"And that's why you're so wrapped up in that computer?" Terry asked, still petting the hot lump at his fly.
"Yeah, it helps keep my mind off sex," he said.
"Well, Matt, tonight you can think about sex all you want," Terry grinned. "In fact I could teach you a few things that you can use when you get to college."
"Like what?" he asked eagerly.
"Like how to kiss," Terry said. She was still squeezing his prick as she leaned over and kissed him on the mouth. She wriggled her slick hot little tongue between his lips and started teasing his tongue with it. Matt groaned and shivered, and his cock throbbed violently and tried to tear its way out of his jeans. When they finally came up for air, he was flushed and breathing hard.
"Okay, now you try it," Terry smiled. He kissed her, darting his tongue into her moth, and she knew he was going to be just as fast a learner as his brother. His steamy tongue-kissing got her hotly excitement, and she creamed fight through her panties. This time it was Terry who was flushed and panting when they finally broke off the kiss.
"How was I?" Matt asked.
"Very good," Terry told him. "You're not gonna have any problems in the kissing department. So let's go on to the next lesson."
She took his hands and set them on her tits. With her hands over his, she showed him just how to squeeze and mold, how much pressure to apply. As she did so, her nipples went erect with lust and poked into his palms right through her cotton halter. Matt snorted with excitement.
"Oh, wow, Sis," he said, "can I put my hands under here and really feel your tits?"
"That's the whole idea," Terry grinned.
Quickly Matt pushed her halter up out of the way and ogled her naked tits. He thought they were the prettiest he'd ever seen. He had a stack of girlie magazines hidden in his room, to read when he jacked off, but all the girls in those pictures had tits like watermelons, really kind of gross. He liked his sister's cute apple-size tits a lot better.
He reached gut, for them and cupped them, and Terry slumped back against the seat and gurgled with pleasure. Her tits were very sensitive, and she loved having them molded gently in a man's big hot hands. Her nipples poked and throbbed against Matt's palms. She was creaming steadily now, unable to staunch the horny flood.
"Mmmmm, that's nice, Matt," she murmured. "Girls also like to have their tits licked and sucked."
Matt was very turned on by that suggestion, and he bent low, stuck out his tongue, and started licking her nipples. Terry gurgled with delight. He swirled his wet tongue around and around the rosy nubs, coating them with his hot spit. Her tits swelled up taut with arousal.
"Matt, you're doing great for a guy who's never been out with a girl before," she laughed softly.
"Well, it wasn't that I wasn't interested," he said.
It was the same way with Todd. He really was interested in girls and sex, very interested, but no way could he find out anything with Mom and Dad watching his every move. No point in dating, for either of the brothers, if their parents insisted on chaperoning. But there was one source of sex their parents would never even suspect their horny coed sister.
Terry was shivering and creaming hard now as Matt sucked one nipple, then the other. She fondled the hot lump at his fly and felt his eager young cock trying to break free of the tight confinement. She wanted to haul out his meat and play with it, but it was too risky with all those people around.
"Matt, honey, let's go park somewhere," she suggested.
"Good idea," he grinned. "The folks won't know we left the movie, as long as we're home on time."
"Exactly what I was thinking," Terry said as she started the engine.
She drove to a wooded area where they wouldn't be seen. There was a full moon out, so they could see each other pretty well. Terry was glad of that as she went for her brother's zipper. She wanted a good look at his stiff teenage cock. She got his jeans open, then tugged pants and shorts down over his ass. His engorged dick snapped free, standing up rigid and drooling thick cream.
She leaned down for, a closer look, and as her hot breath tickled his naked cock, Matt shivered with horniness. She examined the gleaming purple head of his prick, the granite blue-veined shaft, and his lightly-thatched nut sacs. She found herself drooling as she watched that thick cream oozing from his piss hole. She stuck out her tongue and lapped up the salty stuff.
"Jesus," Matt gasped, "is that something else you do to your boyfriend?"
"Mmmmm-hmmm," Terry purred, "we play with each other all over."
Matt grew bold and said, "I'd sure like to play with you, Sis."
"I'll bet you would, you horny little devil," Terry giggled.
"Oh, wow, wouldn't Mom and Dad have a fit if they could see us now?" he laughed. "I can't believe we're doing this, not the way we were raised."
"Well, honey," Terry said, "maybe they aren't right about everything. Don't you think their ideas about sex are a little strange?"
"I think they're totally fucked," Matt sighed, "but what can we do? As long as we live in their house, we have to obey their rules."
"Except when they're not watching us," Terry grinned as she curled her fingers around his cock.
"Yeah," Matt said hoarsely, "except when they're not watching us. Oh, wow, Sis, that feels neat."
She was pumping his cock, smearing his oozing juice all over her fingers to make her pumping slick and fast. Matt slumped back against the seat and watched her, hardly believing his luck. He'd just resigned himself to doing without sex till he got away from his parents, so this was a delicious surprise.
Terry had changed so much since she'd gone away to college. Before that, she'd been just like her brothers, grim and studious and "not interested" in sex. Now she was liberated and uninhibited, not hiding her interest in sex. She made Matt feel that it was perfectly okay to have fun with his body and that he shouldn't feel guilty about being horny.
As she pumped his cock, he asked shyly but eagerly, "Sis, do you think it's okay to jack off?"
"Sure, honey," Terry said easily, "everybody plays with himself."
"Do you?" he asked wonderingly.
"All the time," she laughed. "Wanta see how I do it?"
"Oh, wow, I sure do," he cried.
She remembered how this little demonstration had turned Todd on, and she knew it would work equally well with their kid brother. She pulled up her skirt and tucked it in at the waistband, then skinned out of her bikini panties. Matt gawked hungrily at the little triangle of her bush.
She opened her legs wide, showing him her soaked slit without any shyness. She folded back the furry outer lips and showed him the glistening pink flesh inside. She pointed to a little hooded bud of flesh at the top of her pussy. "That's my clit," she said. "Girls are really sensitive there. I like to rub it and get off."
She pressed a fingertip to the fleshy button and began to rub it in a circular motion. Matt watched in total fascination. Up to now he hadn't even been sure whether girls masturbated and whether they got off like guys did. Now he realized that girls could be just as horny as boys. His big sister was sighing and panting with pleasure as she played with herself. Glistening cream overflowed her cunt and trickled down the crack of her ass.