The spring break holidays had begun and I was back home. Ahh, so nice to be back where you were born and raised! My first day back home was calm and innocent, being mainly about catching up with family. I went to the bed early, being tired from the journey. The spring break at my school would last two weeks. Two weeks of free time! Us students of this academy were blessed among mortals, tee hee hee.

What woke me up the next morning was a kiss on the lips by my mischievous sister. 'Suguha!' I sat up, surprised.

'Missed me, bro?' she got off the bed and made a rotation to show me how good she looked in her blue, one piece swimsuit. I admit she looked wonderf... Wait a minute, why was she wearing a swimsuit? Don't tell me...

My eyes widened, getting the message. 'Mom cleaned our pool?' I exclaimed, happy.

'You bet,' Sugu winked. 'In fact, we can even use it right now!'

I cried in joy. 'I'm putting on my swimsuit and coming to meet you outside,' I declared.

Suguha approached me and whispered something in my ear: 'Put on a condom underneath your swimtrunks.'

'Huh?'

'Just trust me and do it,' she insisted, seductively. 'You will understand soon enough what I'm planning.'

I decided to play along and did as I was told.

I ran to the swimming pool. Mom was lying on a deck chair, wearing a brown, one piece swimsuit and black sunglasses. She was reading something and sunbathing. My sister was in the water, waving to me. 'Come on, bro. Join me.'

I joined her with a dive bomb. We played carefreely and innocently for a while. Everything was fine. Except I still didn't understand why Suguha had asked me to put on a condom. With mom so close to us, there was no way anything sexual could happen.

At some point, Suguha glanced at mom, who was absorbed by her book at that time. She smiled meaningfully at me. 'She's not looking at us. Now's our chance!' she whispered. My mouth wide opened in shock as she swam close to me. No no no, she couldn't be that bold!

And yet she was! Suddenly, she wrapped her arms around my shoulders and her legs around my waist. I felt her hand underwater taking my dick out of my swimtrunks and, after some effort, driving it underneath her one piece swimsuit's part that covered her vagina. My heart was pounding as Suguha fumbled underwater, with mom only a few meters away from us.

Finally, she managed to insert my penis in her pussy! I gasped. I liked this so much. But I knew that this was not the proper place or time. 'Suguha, no, I...'

She hushed me with a kiss. I gave in. I placed my hands on her back, for better balance, but also to enjoy the sensation of the part of her back skin that her swimsuit left exposed. We began thrusting against each other, with her arms on my shoulders, her legs around me and my hands occasionally moving away from her back to grope her anywhere else I could, such as thighs, ass etc

'Suguha, we shouldn't be doing this,' I whispered, panting, as I lowered my head and kissed her cleavage.

'You're right,' she giggled mischievously. 'We shouldn't be doing this... without mom watching us!'

'You're right, we shouldn't...' WAIT, WHAT?

With us still thrusting, Suguha turned to mother and waved! 'HEY, MOM, LOOK, KIRITO AND I ARE HAVING SEX!'

Our mother took her eyes off her book, lowered her sunglasses and looked at us, thrusting! Actually, with water covering the greatest part of our bodies, she could see only a blurry motion, so she assumed that we were just pretending to be having sex to play a prank on her!

'Haha, very funny,' she sighed sarcastically.

I couldn't believe this surrealistic situation was taking place.

Mom went back to reading and we kept thrusting. Our cries of pleasure were getting louder and louder. From time to time, mom would take her eyes off the book and look at us curiously. 'Wow, you're playing really realistically, kids,' she commented.

'We're not playing, mom,' Suguha giggled among her cries. 'WE'RE REALLY FUCKING!'

'Guys, quit this bullshit. I'm not amused,' mom sighed.

We reached a simultaneous climax, tilting our respective heads backwards, our screams louder than ever. I gripped Suguha's waist as she gripped my shoulders, tightening her legs around me. Man, what an orgasm.

Still panting, Suguha turned to our mother and said: 'And now look how we're pretending to raise our pants back after sex.' And, with those words, she put her hand in the water and removed my penis from her vagina, me putting it back in my swimtrunks right after that.

'Bravo, good actors,' mom stood up and clapped sarcastically. 'May I read my book now with no more of your bullshit?'

'Sure,' I said, beating Suguha to answering.

'Grow up, kids,' the older woman mumbled, sitting back on her deck chair.

Suguha and I looked at each other and burst into laughter. In retrospect, I had to admit that was hilarious.

We played in the water some more, innocently, as if that sexual incident had never happened.

Later, when we were thirsty, we exited the pool and went to the kitchen, still with only our swimwear on, water dripping.

As Suguha filled two glasses with juice, one for her and one for me, I removed the condom from my penis. I opened the kitchen's trash can, intending to bury it deep under the rest of the rubbish, so that mom wouldn't see it if she opened the trash can later.

'Let me examine it for a moment,' Suguha snatched it from my hand, giggling, before I could throw it away. She walked to the kitchen window, raised the used rubber and examined it under the sunlight.

'Why are you staring at it?' I asked.

'Dunno,' she shrugged casually, not taking her eyes off the condom. 'I guess I'm just a curious nature.'

'Are you here, kids?' mom said as she entered.

The very next fraction of a moment, the panicked Suguha shoved the condom in her mouth.

'We're fine, mom,' I immediately greeted her, raising my hand, to draw her attention.

After a huge gulp, Suguha raised her hand and said, trying to sound cheerful: 'Yeah, we're fine, mom.'

Darn, I have to quit that habit of causing girls to swallow used condoms to save my butt!