Kevin rose from his sister’s bed, his foggy brain trying to register that it was Wednesday and that Mia would be making a late-morning appearance. Grasping that, he inwardly smiled and then felt a wave of jitters surge through him, his anxiety rising as he thought of her arrival.

Maya was in the shower, washing away the evidence of last night, though the bed and the smell still gave more than a whiff that they had been having sex in her bedroom. Kevin went over to the window and opened it, thinking the bedsheets needed a wash.

Yesterday evening in the dark shopping mall parking lot, Maya had teased her brother in her car. Instead of starting the engine, she ran her hand up his leg and squeezed his thigh. Then, with people still around, she climbed onto his lap, her legs astride her brother's, and reminded him that this week she was his girlfriend.

Leaning forward, Maya began kissing him, her short white skirt once again riding high up her thighs.

“Ever done it in a car?” She teased, knowing full well that he hadn't. Her lips once again came down on his.

Kevin was half listening, his eyes darting around. He seemed to be more aware than his sister of their semi-public setting. Kevin felt trapped, and yet his body could not help responding to Maya’s touch. He wanted her again, just not here; it felt too risky.

Maya, her hands on his fly, softly giggled, "I need you," as she pulled down the zip and then popped the top button. She opened his pants, the cool air wafting over her brother’s cock as she released him.

Kevin's eyes were alert, his gaze fixed, scanning what was outside the car window. He now understood why Maya had parked so far away from the mall entrance. She had planned to do something like this.

Not seeing anyone, Kevin ran his hand up the inside of his sister’s thigh and then touched between her legs. His fingers found the damp gusset of Maya’s white panties, and he mumbled, “I thought you didn’t have any on.”

“Oh, have I?” Maya giggled, “My mistake.”

She rolled off her brother's lap, sat back in the driver's seat, and then wiggled out of her knickers.

With her rather astonished brother looking on, Maya wrapped her damp panties around his semi-hard cock and masturbated him to a full erection. Then, in a fluid movement, her head came down, and she took his cock into her mouth.

Kevin let out a shallow gasp as his eyes continued to scrutinise the mall parking lot for any movements.

Maya’s hand continued to pump her brother as her head bobbed away. Her brother was stunned, his dick rigid, his mind trying to relax and enjoy the feeling emanating from his cock.

Then, as quickly as she had gone down on him, Maya’s head came up. Her hand continued to jerk him; her damp panties were still wrapped around the length of her brother’s penis. Its bulbous gland was now like a purple beacon signalling its presence.

Maya giggled as she removed her hand. “Now hold that thought; we need to get home and fuck.”

With that, she turned on the engine, still chuckling to herself.

Her brother sat there, stunned. His cock seemed to have taken on a life of its own, refusing to soften as he attempted to zip himself up.

Maya pulled away, smiling, despite her brother’s struggles.

Similar to the previous night, upon their return, the siblings fucked, not being able to keep their hands off each other. They were experimenting, and with each thrust, Kevin’s confidence grew, and Maya’s body adjusted to the size of her brother’s huge cock. Nevertheless, despite trying hard, she failed once again to take his full length into her pussy.

Just before sleep took them, Kevin whispered to his sister, “Maybe tomorrow; it was very close.”

*****

Kevin stood there, looking at Maya’s messy bed, reminiscing, his morning wood giving away his inner thoughts. 

Looking at her brother’s erect cock, Maya teased, “I see you’re pleased to see me.” She had walked into her bedroom nude, the only vestige of clothing being a towel wrapped around her head.

“We need to talk about Mia,” Kevin stated, only barely aware of his naked sister.

Maya asked playfully, "So you're not pleased to see me?" before deliberately bending over in front of her brother to ensure she had his full attention.

Kevin stuttered, wanting to talk about Mia, but suddenly unable to think beyond his sister’s exposed pussy. Knowingly, Maya said, "We will talk about her later," before continuing, more harshly. "Now go and have your shower—as you smell.”

Maya's remark startled Kevin out of his reverie, as she sounded more like a sister rather than the girlfriend she had claimed to be the previous night.

Two hours later...

“How many bikinis do you own?” Kevin was surprised to see his sister in yet another new swimsuit that is, if you could call it that. It was nothing more than three tiny purple triangles, the bottom rear just a butt-flossing string.

“Do you like it?” Maya gave her brother a quick twirl before clarifying. "It's known as a micro bikini; naturally, I can't wear it when our parents are present."

“It’s almost pointless,” he replied, being the practical one. Then, with hope, he added, "Do you think Mia will wear something similar?"

“Probably, we have talked about teasing you again!” With a smile, Maya proceeded to take the micro bikini off and lie on her sun lounger completely nude.

The siblings were once again sunbathing in the same deck positions that they had done on Sunday. As before, Maya positioned her feet across the deck, facing Kevin. Next to her was the currently empty sunbed waiting for Mia’s arrival. 

On seeing his sister again nude, Kevin’s cock started to form a tent in his swimming shorts.

Maya noticed.

“Hold that thought,” she teased, deliberately easing her legs apart to make sure her brother would be thinking with his cock. “Now you do remember what we talked about earlier.”

Kevin enthusiastically replied, "Yes, you want me to be more assertive with Mia, and I've been reading the new 'Teen Pleasure' magazine." He pointed to the latest copy on the table next to him, which they bought yesterday while shopping.

“And just go with the flow. Remember, Mia knows you are hung. So, don’t be scared to show it to her if it comes up, just like it is now!”

It was a remark that had Kevin rolling onto his front; though he was unsure why, as his sister was very familiar with his large cock.

As the minutes ticked by and her arrival approached, Kevin could not help but think more about Mia, her tight body, her long legs, and her lovely face. However, with each new thought, his stomach tightened, and his mouth dried with anticipation as his confidence ebbed away.

He lay there filled with hope, reflecting on the things Maya had mentioned to him, such as trying to relax and remember to speak clearly about anything other than chess. The siblings had a plan; today was all about spiking the interest Mia already had in Kevin.

An hour later…

“Hi Kevin,” Mia cheerfully said as she waved—her long legs taking her past him. His eyes tracked them, and he quickly sat up, his heart fluttering, a surge of adrenaline going through him.

This was his big moment, and he returned the greeting.

He enthusiastically waved and said, "Hi there, babe," his mouth not quite in sync with his brain.

On seeing his sister's reaction, he corrected. "I mean, hello, Mia, it's a pleasure to see you again." They were words that had both girls laughing as Kevin blushed; somehow he had managed to sound like one of his British ancestors.

However, despite his clumsiness, Kevin had managed to speak with a wholehearted charm.

Then, as they stripped down to almost nothing in their bikinis, Kevin's embarrassment shifted from the redness of his face to the large tent that emerged in his swimming shorts. Normally, Kevin would turn over at this point, but under his sister’s instruction, he didn't do so today.

Maya was once again wearing her purple micro bikini, and it appeared that Mia was wearing the same style, the only difference being hers was multi-coloured and tie-dyed.

As he stared from behind his dark sunglasses, Kevin’s eyes took in Mia’s long, fair hair, which ran down her back. Below its end was her tight, perk bottom; his eyes dwelled there, though he couldn’t help comparing it to his sister's equally sexy rear.

Kevin felt embarrassed, his large cock tenting in his swimming shorts. So he closed his eyes and just lay there. His mind was still taking in Mia’s perfect body, his erection the only clue to what he was thinking.

This was what Maya had suggested for him to do, her exact words being, “Let Mia have a good look, and don’t be embarrassed. It will captivate her, just like it did with me.” 

There were further giggles; Kevin could only guess what they were about. He dared not look, hoping that his cock would do the talking.

However, as he lay there, his penis now softening, his need to watch Mia slowly increased. Today was his big chance, he thought; with his sister's help, he had to show that he was interested in her.

On Maya's previous advice, he sat up and picked up the latest 'Teen Pleasure' magazine, hoping it would make him more interesting to Mia. Yet, he found himself slipping his chess book inside it as he had learnt enough to know there was nothing of note inside the mag for him.

Then, he looked at Mia. Like on Sunday, she was lying on her front, the micro bikini just doing enough to cover her sex. Her already bronzed bottom was taking in the sun, her long legs pointing at him.

It only took a few minutes for Mia to ask, “What are you reading?”

To Kevin, it appeared she was showing more of an interest in him, which had him thinking that Maya had shared something with her.

He held up the magazine. “There is an excellent article on chess in it.”

Mia looked surprised, and Maya sat up and told her brother that she didn’t believe him. She hadn’t read this week's magazine, but it had never had articles on chess before.

“It’s a fantastic piece about girls playing chess,” he then added, feeling comfortable talking about a subject he knew about. He wasn’t going to show his hand just yet; after all, his sister had told him to study this magazine.

“Girls don’t play chess,” Maya retorted, though knowing that some did.

“I don’t mind chess; I am just no good at it,” Mia surprisingly stated to her best friend.

Kevin jumped in. “I could teach you,” he knew this was something he could do with Mia.

Then grinning, he lifted the magazine, revealing his chess book beneath. It was an action that brought two cushions flying his way. It also had both of the two M’s large breasts flying out of their bikini tops.

Kevin couldn’t help laughing.

Unlike Sunday, Kevin felt included and not embarrassed by his large bulge there for both girls to see. Maya had given him confidence, and as the banter flowed, Kevin realised that girls were not at all an alien species. 

“Let’s go in the pool,” Maya suggested, her breasts wobbling as she got up.

She had completely removed her bikini top, and to Kevin's delight, Mia had done the same.

For the next few hours, the three of them enjoyed each other’s company. The girls remained topless and a more confident Kevin did not try to cover up his frequent erections, especially when he looked in the direction of Mia.

The teasing often flowed between the three of them, Kevin giving as good as he got. Occasionally, Maya would help steer her brother, either stopping him from getting too assured or retreating into his shell.

As the afternoon wore on, a bottle of their parent's wine was opened, and Maya went and prepared a late lunch, leaving Kevin and Mia to some privacy.

With only the two of them, Mia absentmindedly remarked, “You seem different, Kevin.”

He smiled. Her observation had given him a warm feeling inside, yet he was unsure what to say, especially as she had a boyfriend.

“I guess I’m growing up,” he stuttered, thinking of things his sister had mentioned, and then inspired, he remarked. "Anyway, I thought you had only come around here to see me!"

Mia laughed and then stared at Maya’s brother once again. She flirtatiously smiled before her eyes leisurely travelled down to Kevin’s cock, which started to stir.

Even Kevin knew what she was thinking, and with his heart racing, he let his mouth take control.

"Pity you have a boyfriend," he murmured. Maya had instructed him that today he needed to express his interest in going out with his dream girl.

Mia blushed, her eyes darting away from Kevin’s cock.

He was taken aback, not expecting her to blush, as he thought that was something he only ever did!

Then, as part of his strategy to win Mia, Kevin took a risk and said something he had only ever considered saying. "In any case, you probably couldn't handle a younger man."

For Kevin, the next moment seemed to last forever, as Mia's stunning face appeared to ease, her blush transforming into a warm smile, followed by a giggle, and then finally, her lips formed her reply, "You are only two months younger than me!"

“Yep, but it is still two months. Anyway, I am surprised that you already know when my birthday is!”

Mia blushed again, and a new surge of confidence flowed through Kevin as he realised his sister was right—Mia was interested in him!—and, perhaps that also meant she was not serious with her boyfriend, Tony.

Still topless, Maya came out with the food. “So what are you two talking about?” She enquired, suspecting she might have arrived at the wrong moment.

“We were just talking,” Kevin stated, reverting to his more bashful self, yet hoping that Mia was still thinking about him. 

The rest of the afternoon slipped by, and at five they both said their goodbyes to Mia. With an exaggerated wave, Kevin cheekily said, “See you, babe!” which caused Maya to roll her eyes.

However, more importantly, and to Kevin's delight, Mia was laughing as she exited the gate.

Later, after telling his sister all that he and Mia had said in private, Maya took the tip of her brother’s hard cock into her mouth. Her talented tongue once again worked his gland.

“I want you to think of me as Mia,” Maya softly said.

The comment brought a shallow groan from her brother, giving her the impression that it was exactly what he was thinking.

With his mind on Mia, the next words Kevin heard were, “Now it's time to fuck me; I want my pussy to be stretched to take all of your cock!”

Just like the night before, Kevin fucked his sister, her pussy once again almost taking all of her brother’s cock, but not quite all.

Later, the siblings slept in each other's arms, exhausted from their intense and fulfilling sex.

*****

With no other plans, both siblings decided to spend Thursday nude by the pool and engage in frequent acts of fucking. Despite not talking about it, they knew their sexual relationship had to change back to a more normal one.

The day by the pool was only interrupted when Maya taught her brother some basic dance steps and, of course, when they engaged in several sex sessions. As they fucked once again, Maya insisted that she would be taking all of her brother's cock by the end of the day.

Naughtily, the final time they fucked was on their parent’s bed.

As he penetrated his sister for the umpteenth time, Maya screamed. "My pussy was made to be taking cocks, Kevin. So fuck me harder." Her brother’s cock was jackhammering away.

“I thought they were for pushing out babies,” her brother grinned, pausing for a second for a rest and then pounding his sister once again.

A little later, exhausted, Maya panted, “That too, but my pussy is built more for a variety of different cocks.”

Kevin knew it was an admission by Maya that she slept around, but he loved her for it, as it was so different to him. Even with his cock in his sister, he only had eyes for Mia.

Not long later, with the aid of lube, they were in the doggy position, fucking, and Kevin realised his sister was now taking all ten inches of his cock. In doing so, they had achieved Maya’s second mission. Then, with his large testicles now slapping his sister’s bald mound, Kevin announced their success.

It was news that brought a large groan from his sister as she came, marking both the victory and their parents' duvet bed covers.

The day had become a blur of fucking—different positions, different speeds, and almost different holes.

However, when Kevin cheekily asked Maya about fucking her in the ass, she glanced at his huge size and then suggested, “Maybe that was something for the future with Mia.”

That night, following a day filled with sun, sunbathing, swimming, and, most importantly, sex, the siblings found themselves lying naked in bed together, engaged in conversation.

Maya suggested, “There is one lesson you still need to learn before tomorrow night.”

Kevin stood up on one elbow and looked worriedly at his sister.

“What’s that?” he cautiously asked.

“We may have had a lot of sex, Kevin, but there was something we have not yet tried.”

“Anal?” He questioned with a hopeful grin.

Men Maya thought, though she also smiled and warmly said, “No, not that, something more important.”

Her brother looked confused and eventually muttered, “Was it in the magazine?”

This time Maya giggled, “No, Mr. 3.9 GPA.”

“I give up!”

"You need to learn how to make love, Kevin—not fuck, but make love."

Kevin mumbled, now unsure, "Oh... Is there a difference?”

"Yes, it's a big one—now do remember that I am your girlfriend—so make love to me."

That's what the siblings did long into the night, but Kevin didn't need the lesson, as his love for his sister now matched...