My mother and father could not be more different than each other: She was short and chubby while he was tall and well built. He was a control freak, and she usually allowed him to make decisions, unless he crossed the line. How they connected escaped me.

My name is Mary, and I have an older brother, Paul, who is 2 years older than me. I adore him: Now, at 21 years old, he is 6'1", 188 pounds of pure muscle due to long time on the wrestling team. He always was a good student and helped me on multiple occasions when I had no clue what the teacher was talking about. As you can guess, I wasn't the brightest in my class, and my scores were about average.

Unlike my brother, who showed his prowess on the wrestling mat but was quite shy in public, I was very social. I had 2 BFFs and many suitors. Most girls liked me because I loved gossip, was constantly on social media, and updated them on anything important I'd heard. I knew quite well that guys were not attracted to me because I was the new Einstein, but due to my physique: I am 5'3", 122 pounds, shoulder length wavy hair, with cute face and humongous tits. They are no bigger than D cups, yet on my short frame and narrow waist, they look enormous.

The summer vacation started, and both Paul and I returned home to New York. I just finished my freshman year at NYU and was not happy with 2 of my professors. It started about 4 months into my first year. Both teachers seem to take on me for minor issues. They still gave me decent scores, but they were inclined to embarrass me in front of the other students. I talked about it with Paul, and he suggested I move to one of the multiple universities in Boston. Initially, I rejected the idea since in the first year I gathered many friends, but the situation, especially with one of the teachers, became unbearable, and I applied for my second year to 5 colleges in Boston.

I got lucky. I acquired enough credits, and one of the 2 places that accepted me was Boston University, where Paul was about to start his senior year.

During the summer vacation, I spent a lot of time with Paul. I wanted to know everything about Boston University and the city, where I was going to spend my next 3 years. He was so nice to me: Always ready to lend a hand or talk about everything I inquired. Due to his shyness, he had only a single friend, and as far as I knew, for 8 months he dated a redhead, but it ended a year ago. So he was probably happy to spend time with me. I liked to tease him about his timid behavior in public, and when we went to a restaurant, I often had a provocative comment, just to see him blush.

That summer vacation, Paul and I spent time together more than ever and got closer. Our rooms were adjacent to each other, and frequently we walked to and from the bathroom in our underwear. About a month into our vacation, I noticed Paul ogling me anytime I was less dressed. I found it funny and used every opportunity to 'accidentally' appear underdressed before him.

One morning, I came out wearing only panties and a bra and strolled leisurely to the bathroom. From the corner of my eye I saw Paul sitting on the sofa, staring at my bouncing tits. Nothing new. As I entered the bathroom, I realized I forgot my favorite brush in my room. I exited the bathroom and saw Paul still sitting, but now his hand was wrapped around a huge tool, jacking off... I stopped in my tracks, and said, "Paul, that's a nice meat you've got there. I wonder what made you decide to do it now, and not in your room. Was it watching me barely dressed that aroused you?"

His face turned crimson red, "Stop that," and he ran to his room. I giggled. After that episode, I made a habit ensuring that each time I needed his help or we were together without our parents, he could get a good view of my cleavage. I loved the game, and the fact that my brother never realized it was intentional. Paul often wore shorts, and lately, every time he was close to me, a tent appeared in the front of his pants. Funny, and... somewhat arousing too.

In the second month, Paul became bolder. One evening, I was supposed to go to a party with my BFFs. In the morning, I prepared the silky pink bra and matching low cut panties on top in the respective drawers. Later, when it was time to dress for the party, the bra was at the bottom of the drawer, and the panties were not there at all. I chuckled and chose a white set. After dressing up, I moved by the laundry basket to check if my beige dress was there. At the bottom of the pile, I found my pink panties. They were stained. I sniffed them and, as expected, the familiar smell of sperm penetrated my nose. So my horny brother was into masturbating using my panties...

This is the place to mention that despite my tender age of 19, I've already had sex with 3 guys as a freshman. With two of them, it was a short fling that lasted a few weeks, while the 3rd one lasted 5 months, but since I was moving to Boston, we separated amicably. This last guy was really a good one: Handsome, smart, a jokester, and a good lay. Together we explored all kinds of sexual positions. He was 26 years old, and turned out to be very experienced in bed. Through him, I learned how to enjoy sex to the fullest. He always began exploring gently, leading me through tender touches to a high level of arousal before making me beg him to fuck me hard and rough me up. Sex with him was the best.

A week before our school year began, it was time to move my stuff to Boston. I thought of taking a U-Haul, but Dad insisted he would drive me from New York to Boston in his car. Good idea if Mom and Paul stayed in New York, but both wanted to join. So Mom said, "We'll have ample space for everything if I drive my old Chevy."

Dad laughed, "Honey, it's a 4.5 hour drive."

"I can do it. I want to be sure Mary gets there safely, and all her stuff is OK."

So Dad drove his car with Paul in the passenger seat, and I sat with Mom in her old Chevy. An hour and 15 minutes into the road, Mom's car started choking and then stopped. We called a tow truck, which took the car to Stamford. However, to check and fix whatever was needed would take days. Paul and Dad loaded the stuff on the Camry's roof and luggage area, but there were still 2 chairs remaining, which they put on the right side of the back seat.

Dad smiled at me, "Honey, I am the driver and Mom will sit by me, so you'll have to sit on your brother's lap for the next 3 hours. Can you do that?"

I glanced at Paul, winked at him, and blurted, "I'll be fine, but poor Paul will suffer having to carry my 120 pounds for many hours."

He smiled, "I think I can do it. You weigh much less than my wrestling partners, and I can lift them..."

Dad mumbled, "It's settled then. Let's move."

In theory, the 3 hour drive should not have been a big deal, but early on, several facts became obvious: It was a hot day. Paul wore shorts, and I had on a miniskirt. This meant our flesh would touch each other the whole time. In addition, there was a big traffic jam on the highway, and Dad elected to divert to one of the side roads.

The road became bumpier, and multiple times, my body jolted upward, landing on Paul's groin. I used my phone to text Paul, 'Put your hands on my thighs, so I won't jump as much.'

He didn't answer, but a minute later I felt his trembling hands on my thighs. This action kept me from jerking too much, but I was still swaying back and forth somewhat.

After like 10 minutes, I felt a hard thing expanding behind me and pressing against my crack. There was no confusion about it: Paul had an erection! I hesitated. At home, I'd joke about it, but in the car, both our parents were present in the front seats.

I bent slightly forward and listened to Mom's and Dad's talk. Initially it began like a talk, but now they were fighting: Dad blamed Mom for not taking care of her beaten Chevy, and she blamed him for being too cheap to buy her a newer one. As their voices turned louder, I said to Mom, "Please, turn up the radio's sound level. We are not interested in hearing your argument."

She turned it up and continued verbally attacking Dad. I, on the other hand, was bored and decided to spice up the trip. I sat backward and leaned my head on Paul's shoulder. I sensed him bending his head and smelling my hair. Within seconds, his penis resumed its ascent.

Knowing Paul was getting horny with me on top, my coochie started leaking. I remembered the times he ogled my breasts and jacked off in my panties... I haven't had sex in weeks and feeling a stiff cock ready for action was like aphrodisiac for me. I also recalled how my brother was always ready to help me without asking anything in return. And he didn't have sex for a long time, IF EVER! I wondered if it was time to be 'nice to him' and fulfil his fantasy...

I texted him, 'Paul, I feel a pleasant pressure against my butt. If I am not mistaken, it's because of me. Anything I can help you with?'

He texted back, 'Sorry sis, if it happened at home, I'd know how to deal with it, but in this tight place we are stuck.'

'Do you always get an erection when riding in the back seat, or are you getting excited because of me?'

'What a silly question!'

'Paul, feeling your hard dick makes me also horny...'

'Really?!'

'Cross my heart.'

'What do you suggest?'

'Mom and Dad fight with each other, and the radio's decibel level is high. We can play.'

'What do you have in mind?'

'I noticed you ogle my tits each time a button was open or I walked wearing only a bra. Are you still interested?'

'God! I wasn't aware you knew it...'

'Care to feel them?'

'Are you serious???'

'Are you or not?'

'Of course I'd love to.'

I grabbed both his palms and moved them from my bare thighs to my covered boobs. 'Happy now?'

His breathing quickened and his hands quivered, as they gingerly rubbed my boobies. My arousal grew as well, and 5 minutes later, I texted again, 'Is this enough to satisfy you, or you wish to feel my bare tits?'

'Mary, please...'

I removed his hands, unbuttoned the top 4 buttons on my blouse, and unclasped the bra. I took his hands and placed them on my giant girlies. His hands were warm and pleasant. My nipples hardened immediately, and I felt my blood begin to boil. My pulse rate was very fast. I moaned. Fortunately, nobody else heard it. I grabbed a tray from the right seat, and held it before me, so neither Mom nor Dad could see my body if they looked back. But they were now arguing whether to open windows or not, so paying attention to their children was the furthest on their minds.

Paul became more daring. His fingers tweaked my tits and his pole continued extending. I held the tray with one hand and texted with the other, 'I think both of us are very aroused.'

A second later, he replied, 'If we continue, I might ejaculate in my pants.'

'I have a better idea. Unzip your fly and free your dick.'

'Are you crazy? Our parents are inches from us.'

'They are fighting like a dog and a cat and seem to care about nothing else.'

'You are nuts!'

'OK, don't do it. I'll masturbate myself and cum on top of you.'

'Please, don't...'

'Paul, I am too horny. Either I do it myself, or you wish to participate. Look, you played with yourself countless times thinking about me, and even came in my panties. Are you sure you are not into taking this once in a lifetime chance to actually live your fantasy?'

'Mary, if you offered me this at home, I wouldn't think twice, but here I am scared...'

'Chicken. Look, I'll try to move very little and be as quiet as can be.'

He sighed, 'Damn you. How can I resist?...'

I grinned, 'Good boy.'

Next, I raised my torso a little, removed my panties and felt his hand slipping under me. As he released his cock, it jerked up and touched my moist pussy lips. I slowly sat on it, feeling it dilating its way up my narrow pussy. It felt great, filling my vagina to the rim. I waited a moment, letting my cunt widen around his big pecker and then started gradually moving up and down on it.

Subsequently, his finger descended to my mound and tickled my sensitive clitty. I jolted up and began shuddering. I inserted my thumb into my mouth so I wouldn't scream and felt Paul's strong arm trying to hold me down. My first orgasm was pleasurable yet short. He didn't cum yet.

Next, his pelvis began pounding me from below, as his right fingers rolled my right nipple between them, while his left hand massaged my labia, swirling around my love button. My arousal shot up once again, and I heard myself groan.

Then I heard Paul hiss in my ear, 'I am going to cum any minute now!'

Thirty seconds later, his left fingers kneaded my clitoris, and I exploded a second time. Paul erupted inside my pussy shortly after, filling my vagina with his slimy goo. I loved it! Having a guy cum inside me during my climax was always my favorite scenario!

When we recovered, I texted, 'Thanks, bro. It was exactly what I needed.'

He texted back, 'You welcome. I loved everything too.'

About 5 minutes passed, and Dad turned his head back, "Soon we'll have a pee stop. We'll rest for 20 minutes, and then continue. Because of the change in our plans, we'll have almost 2 more hours. Can you manage back there?"

I smiled innocently, "I can, and Paul is strong, so I think we'll be all right."

Paul and I attempted to cover ourselves as much as possible until we reached a wooded area. Dad stopped by the side of the road and turned to Paul, "I'll go with Mom between the trees on the right, and you two will go to the left. Paul, ensure your sister is safe, you know - snakes, coyotes, whatever."

Once we were away from our parents, I removed my skirt and panties. As I crouched, ready to pee, I noticed Paul's rod was at full mast. I chuckled, "Apparently cumming once was not enough. You took care of my coochie very well, so come closer and I'll give you head."

He stared at me as if I had just landed from another planet, "Sis, I don't know what happened to you, but this is by far my happiest day ever."

I smiled sweetly and murmured, "Yes, it's mainly for you, but I also love sucking a juicy cock."

My full lips enveloped the large mushroomed head, and I milked it lightly. I tasted the dry stains of his prior ejaculation and gradually took him into my oral cavity. His thick girth filled my mouth nicely. I pressed it between my tongue and the upper palate and started bobbing it. I used my hand to gently jiggle his testicles. Despite cumming about 1/2 an hour earlier, he climaxed with less than 10 minutes of blowing him. I savored his seed, cleaned his junk with my tongue, and we both peed.

When we arrived at the car, our parents were there already, and Dad joked, "I thought at my age MY prostate would be a bigger issue..."

Paul joked too, "A bear and 2 hyenas pounced on Mary, and I saved her. It took time."

We continued driving. I rested my head on my new lover's chest, while his hands roamed freely under my blouse. His rough hands began touching me tenderly, but 15 minutes later, he started massaging my ample breasts and then gingerly pinched my nipples.

His constant manipulations of my tits made me horny once more. I texted him, 'Bro, you better have a plan to take care of what you are starting, because I am getting hot and wet again.'

He didn't bother to answer; his stiffening tool poked my ass.

I texted, 'You have no shame, planning to take advantage of your little sister the third time.'

'Sis, you can keep the skirt and panties on. I'll just move the panties sideway and fuck you while you are fully dressed.'

'Pervert!'

'True, but you love it!'

'I do...'

This time, Mom and Dad did not talk, but the music was loud enough to drown out our soft noises. As I ground his big rod, he fingered my clitty, and when I got close, he inserted a wet finger into my anus. I orgasmed the 3rd time, having bliss. Paul lasted longer, prolonging my own orgasm, but then he growled and spewed his lava deep in my womb.

Mom must have heard his sound and asked, "Is everything OK back there? We'll be at our destination in 35 minutes."

I said, "Paul must be tired. He was just yawning loudly. Everything is fine."

When we arrived, Paul asked me, "Mary, you were wonderful. Was it a one time thing?"

I grinned, "Why don't you check again when Mom and Dad are back in New York?"​