At the age of sixteen my younger sister had developed physically into a beautiful young lady. Her figure was to-die-for according to her close friends who clearly envied her body. Not only was she blessed with stunning looks, beautiful hair, well developed boobs, and a tailored waistline but also a model’s legs that went on forever. In short she was a show-stopper.

But her outward maturity did not reflect her inward mischievousness!

Being a brilliant fine arts scholar and highly creative she was always pressing boundaries through curiosity and somehow got away with it.

As siblings we never fought and much to every parent’s envy we were real buddies and in fact inseparable. She was my shadow and I was her hero. Even my parents acknowledged it. Being eighteen months older than my little sister my seniority compelled me to protect her at all times.

One day I had just finished showering when she ‘accidentally’ walked in on me. I was drying myself down but had developed one of those uncontrollable boners which only teenagers can identify with. It was rock hard and throbbing. It looked like bursting. The head was a bright red! Her eyes fixated. She didn’t apologize but just kept staring and smiled.

“Wow, you are a real man, Brian. I never imagined you to get that big!”

I was chuffed!

“I love your ‘willy’, especially when it’s so hard. Can I touch it?” she asked.

Without hesitation she fell to her knees and enveloped her hands around my hard-on which made it even stiffer and thicker. It ballooned to a shiny purple on the top which almost reflected her face in it. She was infatuated. She kissed it, then licked it, tasting every lap. Her tongue encircled the lip edges and it felt as though I was about to shoot my load right into her face.

She opened her mouth and her soft lips slid uncontrollably over my throbbing head onto the shaft. She began to suck like an extractor pump whilst her tongue licked that highly sensitive area just underneath.

The pressure and the excitement were electric as I shot my load right down my sister’s throat like a rapidly firing machine gun. She almost gagged on each load but managed to swallow it as I felt my knees beginning to weaken.

She gulped one more time and withdrew from my still stiff cock. Her face was flushed. She looked helpless and totally speechless!

She quietly stood up, washed out her mouth, gave me a big hug and whispered, “I truly did not plan all that, but loved it, thank you!”

I just stood there still fully erect and in disbelief of what had just happened. I’d experienced the most magnificent blow-job by my very own little sister, who was now a stunning young lady.

She smiled and quietly disappeared into her bedroom.

This innocent relationship developed into a deep friendship and we would exchange the most intimate details of anything that we saw or troubled us, even as children, but now more so as young adults, confiding in each other rather than our parents. The trust relationship was incredible.

She would often tell me what her friends had been up to and about the advances of some of the boys in her class.

This particular night my parents went out and left us studying and doing our homework. Cathy was given a “lights-out” curfew. But I was left to study for my year-end finals. At the designated time she came into my room and announced that she was feeling a little insecure and asked if she could sleep in my bed until I wanted to go to bed and then she would move back to her room. I agreed.

I finished my school assignments and started undressing as she appeared to be sleeping soundly. But unbeknown to me she was peeping at my every move and once naked she could not contain herself any longer.

She sat bolt-upright and quipped, “Wow, Brian, I love your “willy”. I wish I had one. It is really so big.”

That was enough to start a massive erection, possibly the biggest I’d ever had so far. Cathy was mesmerized and tried to reach out to touch it. I quickly grabbed my sleep shorts and pulled them up and over it. She chuckled as I looked quite embarrassed and bewildered.

I quickly reminded her of our deal that she agreed to go to bed now as I was ready to sleep. But as always she got her way and stayed to chat for a little while longer. She then invited me to join her in MY bed!

I just smiled and innocently lay on the extreme edge almost falling out. We lay still for a while then she put her hand on my chest and said,

“Wow, you’ve grown into such a strong young man. I can feel your muscles!”

Her hand bumped across my nipples and started to play with them. They hardened and she complained,

“Yours are bigger than mine”.

With that she sat up, pulled off her pyjama top and shouted, “Look!”

Her pink nipples were already incredibly well formed as were her breasts. That beautiful view did not help my already hardened cock at all. In fact it started to throb.

She lay back, pulled me closer and snuggled into my arms topless. I loved feeling her warm body and her amazing boobs on my chest. It was so special.

Her hand reached down onto my tummy and felt the hair there too. She was fascinated. Her hand followed the hairline under my sleep shorts and soon touched the head of my bursting cock.

She exclaimed, “Wow, it’s so huge!” Without hesitation she started to rub my shaft. She was loving every stroke and so was I!

Not satisfied, she exclaimed, “ Ooooh! I need to kiss it again!” and started pushing down my sleep shorts .

She removed them and decided that as I was totally naked she wanted to be as well. She stood up and removed her PJ bottoms and looked so cute in her tiny pink bikini panties with her developed pussy lips pressing hard against them. But alas these too were instantly removed!

She lay down next to me again and then decided to hop onto my tummy with a leg on either side. This provided an unobstructed view of her tight little pussy. It was so special and I was beginning to desire it. I could see deep inside as her pink sanctuary was openly displayed. Even her pink inner lips were clearly visible guarding the entrance to her love canal. And of course her delightful clit head just seem to beckon me in. I was truly mesmerized. What a sighting, all from my little sister.

She lay forward on top of my chest and slowly slid down between my legs to kiss my cock. Well as it was already throbbing, the warmth of her body rubbing down on it and over my balls just accelerated the entire process. I could feel that I was going to explode.

Then it happened. Her pussy lips pushed down on its head and started to kiss my shaft. My cock erupted just like any teenager's would. Cum spewed everywhere! It shot all over my tummy as well as my sister's but thankfully not on the sheets. Thank goodness she had removed her clothing!

She was dumbfounded!

”What happened she exclaimed? Did I do something wrong,’ cause it felt so nice?”

“No, nothing,“ I replied, ”That was awesome. Thank you. That’s what happens when a beautiful woman like you excites a man. He cums! It is the most wonderful feeling in the world. Thank you.”

She rushed to the bathroom and fetched a wet face cloth. I wiped her down and then myself. But she seemed disappointed that she had still not kissed my cock.

I reluctantly agreed and lay back on the bed. This time she climbed on between my legs and took my now softening shaft between her hands and said,

“Oh look, it's still leaking!” 

I smugly told her to wipe it clean or lick it off. She enthusiastically licked it and enveloped the head between her lips and sucked it again like a baby latched to its mothers breast. She extracted all the juices. She enjoyed it so much that the sensation caused an instant swelling. Her hand started to rub up and down my shaft once again. I told her to use her other hand to fondle my balls.

She needed no encouragement. She sucked so hard that I thought my balls were moving up my shaft. It was awesome and I didn’t want her to stop. She was happy and smiling and then I suddenly shot my second load right into her mouth. She looked a little surprised but undeterred. She sucked it all up and swallowed it.

I was exhausted and eventually gently eased her off as I was well and truly drained.

She was satisfied.

“Thank you,” she exclaimed. “Can I do that tomorrow night again please?”

I persuaded her to go to her bedroom now and to get some sleep before the folks returned. She reluctantly obeyed.

I love my sister. She was turning into a real little sex nymph and I loved every minute of all the attention.

A few nights later, once the entire household had gone to sleep, she tip-toed back into my bedroom totally naked. As far as she was concerned there was still some unfinished business to deal with. She slipped into my bed and started massaging my cock.

I awoke with a jolt! She chuckled, pulled off my shorts and again straddled my tummy but gently positioned her pussy directly over my cock head and started rubbing it up and down. Her curious mind wanted to see exactly what happened when I ejaculated.

The gentle rubbing between her puffy lips and the teasing from her little clit head did not take long to achieve the desired affect. She was also enjoying the ride. Her eyes closed and her face began to blush. I could actually feel her pussy lips tightening around my shaft and I knew she was on a ride to ecstasy.

My cock exploded and she fixated on each eruption. She loved it. “Awesome,” she exclaimed. “It gets so hard and turns almost crimson in colour. I love it. Didn’t think it would stop shooting either. It’s so cute.”

With that she hopped off and leaned over to suck up all my love juices.

Her rounded bum was directly inline with my hand so I gently stroked it. Instinctively my hand moved down to the inside of her thigh and onto her pussy. Her body shuddered.

She loved that too and actually stopped sucking and said, “That feels so nice, please do some more.”

My fingers slipped onto her wet pussy lips, up to her clit.

“Oh yes," she whispered, "more please,” so I gently rubbed it and her whole body stiffened.

She gasped, and moaned with pleasure. I realized that she’d just experienced her first orgasm.

Thereafter, many midnight encounters followed.

My sister’s body had suddenly developed into a young woman. She kissed and sucked my ‘willy’, as she insisted on affectionately calling it, and I kissed and sucked and licked deeply into her pussy which gave her an instant orgasm each time.

I actually imagined my cock to be growing even more due to all her sucking. Her nipples had now become fully erect and perky, and her clit head had expanded incredibly, maybe due to all my sucking I thought. Even her puffy lips were juicier than ever before.

But the interrupted late nights were soon detected by mother. She cautiously inquired whether we were sleeping well enough. We both offered the large amounts of study and homework as an excuse and fortunately this was supported by excellent exam results later for both of us.

To be continued …Part II: Teenage Challenges