A pool session with my girlfriend’s sister

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I bought a house with my girlfriend Claire a few years ago and we’ve spent a lot of time renovating and redecorating the place since then. Despite having two large families, it’s usually just the two of us, and we rarely get any help from our siblings or parents. My girlfriend is rarely bothered by this, but I am often disappointed, especially about her siblings, that they do not offer any support.

Claire is rather small, has blonde long hair, blue eyes and soft white skin. Exercising will never be her forte, which is why she does not have a completely toned body, but she is still slim. Only her belly is a bit curvier, which I discover very attractive, but it at all times makes her feel a bit insecure. However, another part of her body I love even more – her large boobs. She has a busty 36D cup, which some bras have failed to support. Watching her in cowgirl position at all times makes my cock hard as steel and I can feel the blood pumping inside of it. But our sex life has been somewhat neglected due to the house acquisition – although my girlfriend is very open and interested in new things and sexual stimuli, our rate of sexual intercourse has decreased considerably lately. I often end up running around with a loaded gun, especially when she’s presented me with her big tits in a tight top or showing cleavage again.

Claire has two older brothers and a younger sister, Nina. Her brothers live a little further away, Nina only has a ten-minute drive. Nevertheless, you see her on rather rare occasions, why I don’t really know. I often have the feeling she doesn’t like me, or tries to avoid seeing me, but my girlfriend at all times calls that nonsense. I’m probably also a bit too prejudiced, because I’m often annoyed by her lack of support, since she lives so close to us. My relationship with her is hard to describe – sometimes there are phases where we can talk about anything and I feel like we find out each other and are very comfortable with each other, sometimes there are moments where I’m just angry or confused as to why she ignores me or is so tight-lipped.

One thing is clear, however – appearance-wise Nina is an absolute bombshell. She is endowed with the same genes as Claire – long blonde hair, flawless skin and blue-green eyes. Unlike my girlfriend, however, Nina is very keen on exercising and works out regularly, which is clearly visible in her toned stomach and tight butt, which can be glimpsed through her jeans. And then there is this one thing that bothers me – the good Lord meant it even better with her in terms of bust size than with Claire. Although she rarely wears large necklines (because she also has problems with self-confidence – a phenomenon that one often sees in women and at all times leaves one amazed), her sizeable mountains can not be hidden even in wider clothing.

Once, at a birthday party at her house, I saw laundry lying in the bathroom and took a quick peek – her bra said 34E.

“Holy crap – are those massive udders” I wondered to myself. Combined with her flat stomach and feminine curves, she looks like a true goddess.

So I often fluctuate between anger at her behavior towards me and an insatiable lust to hold her epic breasts in full glory just once and fuck her savagely afterwards.

“Honey it’s been so hot for weeks now – shouldn’t we maybe get a pool” Claire asks me on another scorching Friday.

“Yeah, I’ve been thinking about that all along too. I’ll dig a hole tomorrow and then we’ll get a pool at the hardware store” I answer directly.

“Remember that Nina wants to come tomorrow. So, I can’t help you” Claire replies.

“Nina, come on – what does she want?” I ask, surprised.

“I don’t know – just having a chat again,” Claire explains, slightly annoyed, because she understood the undertone of my question.

“Okay, that’s fine with me”.

The next morning, I begin early with the digging of the hole for the pool, because high temperatures are announced again. With the shovel I poke hole after hole and the earth patch gets bigger and bigger. Shortly before noon Nina comes and sits down with Claire outside in the garden. She greets me briefly, which again makes me wonder if something is wrong. She wears a black dress, which exposes her gorgeous legs and also hints at a bit of cleavage. I risk a quick glance, and luckily it goes undetected.

While the two are talking, I continue working. They are deep in their conversation and only rarely look over at me. My thoughts, however, are mainly with the two divine ladies sitting there on the other side – so so many times I have imagined how it must be to seduce the two together. How they are standing there in lingerie in front of me and their breasts are pressing their bras on tension. How they finally expose their masterpieces and I can massage and kiss them. How they both bend over in front of me and take my hard cock in their mouths in turns and suck it. How Nina rides me while Claire sits on my face. How the two of them moan out their lust in unison while we drive each other crazy. And how they extract the juice from my balls at the end and fight over who gets more of it.

My ordinary male fantasy shows effect – on the one hand, I am already significantly progressed with my work, on the other hand, my little pal announces himself as alive as my work pants now bulge out a bit.

Could the two of them possibly see that? I’m having some fun with it and decide to push the whole thing a bit to the limit. I take off my now quite sweaty shirt and continue digging my hole.

“Poser” Claire yells over, laughing.

I look at the two and see that Nina briefly looks over, but then again quickly looks to the other side again.

Does she dislike the sight or is she a bit more attracted than she would admit?

I watch her for the next few minutes inconspicuously and indeed, her gaze wanders to me briefly every now and then. “Well, you don’t find me as uninteresting as you always do” I think to myself.

The preparations for the pool are now complete and I decide to perform another short tease. With my upper body sweating, I walk over to the two and demonstratively stop right in front of them. “I’m about to go to the hardware store and get the pool” I say as I discreetly flex my stomach to show off my six-pack.

“It’s fine honey – thank you!” exclaims Claire happily.

“By the way, Nina has already said that she will come more often when the pool is here – she doesn’t like going to the public baths, but she loves it here in our garden, which is protected from view,” Claire adds.

“That’s a great honor for us,” I answer with a slight undertone and walk towards my car.

The next morning, the pool is finished and installed. The installation is trouble-free and Claire and I enjoy a first short splashing around. The cold water is really pleasant and the best antidote for the heat.

In the afternoon, I decide to take a second short session and put my swim trunks back on.

“I’m going to see my parents for an hour” Claire comes towards me from the other room. “We want to talk about my birthday plans”.

“You got it – then I’ll just have fun in the pool by myself” I reply with a grin.

As I slowly get into the pool, I hear Claire’s car drive away. I dip my head under the water a few times and dive. Afterwards, I drift on the water with my eyes closed and enjoy the peace and quiet. Until I hear another car door.

A few seconds later, Nina is standing at the door of the garden with a small bag.

“I wanted to come for a splash” she says in a joyful voice.

“Claire went to her parents 5 minutes ago, she will be gone for an hour at least”.

Nina looks disappointed. “I guess I’ll be leaving then, right?

I briefly weigh in my head whether this situation could be awkward or not, but the voice inside me screaming for her glorious body in a bikini is significantly louder.

“Oh nonsense, if you don’t mind, just come in”.

With a smile on her face Nina replies, “Great, I’ll get changed in the house and be right back”

I do a few more quick dives and then look discreetly but eagerly at the door leading out to the garden.

When Nina comes out of there after a moment, I feel the blood boiling in my body. She wears a black bikini, which in combination with her blond hair ignites fireworks in my imagination. Her belly is well-toned, you can clearly see the soft but not too masculine imprints of her six-pack. Her thighs are smooth and shining in the sun. She slowly approaches the pool and I cannot help but watch her perfect body move. And finally, she presents her breast a little more openly, which due to their size jiggle back and forth very strongly and demand everything from the stability of the bikini.

I’m sure she knows how I’m eyeballing her, but my head cannot help it – and it seems to me that she likes this attention. Because the way she walks to the pool is already a bit provocative and teasing. My body reacts to this sight in the same way as it did to my brief fantasy yesterday – a tent is pitching in my swim trunks. I move to the corner of the pool a bit, hoping she won’t notice my hard on. She climbs the ladder into the pool and sinks into the cool water, grinning briefly at me as she gets in.

Why was she grinning at me? Did she notice it after all?

We both enjoy the water in silence for a few minutes, exchanging brief glances every now and then. I try to distract myself from her body so that my cock recovers, which it eventually does after a few minutes.

“Well, has your partner down there calmed down again?” Nina suddenly asks me, looking me in the eyes provocatively.

“Fuck, did you notice that?” I answer with shame.

“Yes, and not only today! Yesterday while working, your whole pants were bulging out. Were you staring at me like you were just now?”

“I don’t know what to say” I start to stutter. “I’m really sorry”.

“Don’t be sorry, I’ll take that as a compliment” she soothes the situation.

“Thanks. And honestly Nina, didn’t you also check on me a few times yesterday when I was working. I didn’t leave you that unimpressed either, did I?

Nina now has a look in her eyes that I don’t know from her – lust and horniness sparkle in there.

“Well honestly Alex – I spent all afternoon wondering what that bulge in your pants looks like” she says in an aroused voice.

I feel my body go into an adrenaline rush as Nina finishes her words. My cock is immediately hard again and presses itself against the fabric of my pants. Nina doesn’t miss this and she bites her lips for a moment.

“And the reason I was walking around like this yesterday is because I was wondering what your big jugs look like all naked” I counter, now completely aroused as well.

She is now coming closer and closer to me in the pool, looking me in the eyes all the way. Her hands move to the back, to the bow of her bikini.

“Then I guess we should reveal these secrets” she whispers to me and opens the bow.

Her top falls to the surface of the water, exposing the most perfect tits I have ever seen.

Her nipples are small and petite and already clearly stiffened by our talking. Her areolas are also rather petite and light in color. Due to their impressive size, her breasts are hanging a bit, but this makes the whole thing even more spectacular and impressively shows why natural breasts still build the greatest level of eroticism for me.

“My God, Nina, they are incredible”.

I grasp her butt with both hands and pull her against my body. Her naked tits are now pressed against my torso and I kiss her passionately.

I grasp her butt with both hands and pull her against my body. Her naked tits are now pressed against my torso and I kiss her passionately. Our eyes are closed as we enjoy each other with all our senses and our mouths and tongues are exploring each other. I bite her lips gently, then let my tongue circle with hers again. Her kiss ignites flames of lust in me and I want to feel every fiber of her body. She moans softly and our breathing quickens.

At that point I feel her hand move under my pants and grab my hard cock.

I help her and undo the knot of my pants and pull them all the way down under the water. Just like Nina’s bra, my trunks now are floating through the pool. With her right hand, Nina grabs my throbbing cock and starts jerking it underwater. I moan as she thrusts my shaft up and down a few times.

“What a nice cock you have, Alex” she moans as she picks up the pace a bit. Her hand feels amazing and I cannot believe she’s jerking me off in the pool. I begin massaging her tits and take her nipples in my mouth. I notice that she is also getting more and more aroused. With my mouth I wander to her earlobe and lick it gently. Then I whisper in her ear” Shall I finger your pussy, you naughty girl”.

“Oh my god, yes” Nina quickly replies and increases the pressure on my cock with her hand.

I take off her panties under the water and through the surface of the water I see a smooth and shaved vagina that is craving for satisfaction. I gently slide my index finger into her and start to move it with light pressure. Her pussy widens so that I can directly insert my middle finger. Despite the water which usually dries out the vagina, I can feel how wet her pussy is and so I increase the pace. My fingers penetrate her G-spot, while I continuously apply the pressure upwards in a come-hither motion. Her growing moans and rapid breathing give me confirmation that I’m in the right place.

The wondered of us pleasing each other in the pool drives us both closer and closer to climax. I finger her hard and fast now, which gets her divine body rocking and rolling more and more.

Her pussy starts to contract – the orgasm is now reeling into the station.

“Alex, I’m cumming, don’t stop”.

I continue to finger at the same pace and now pinch her nipple a little harder. Nina has briefly paused jerking me off so she can fully concentrate on her climax. That comes strongly as her legs start to quiver. Due to the intense impulses, the pool water also starts to splash heavily. After a moment of pause, Nina can control her breathing again and looks at me with satisfaction.

“Alex, we don’t have much time left – I want your cum” Nina commands me with a ravenous tone.

She starts wanking my cock again and increases the pace. Her hungry look is driving me crazy. Then she maneuvers me to sit on the top step of the ladder. I follow her directive and my cock is now hanging above the water in the open air. Momentarily surprised, I quickly know what is gonna happen next. With that, her delicate lips gently slide over my cock and start to suck it.

Until now I wondered that my girlfriend’s blowjobs were amazing, but what Nina is delivering here is in a whole different league. The way she worships the cock, sucking up the thick shaft with her mouth, making slurping sounds of lust and jerking it off in addition, makes me know that I won’t be able to take this for a long time.

It feels incredible how warm and wet her mouth is pressing around my cock.

“Well, do you like the way I’m sucking your dick?” Nina moans at me.

“Holy shit – you sexy minx, I’m about to explode” I groan back at her.

“In that case – you’re about to get what’s been driving you so insane” she grins and lets my penis jump out of her mouth.

She takes a small step forward and bends over me again. Both of her hands move to her chest, which she now squeezes together to form a passage down the middle. Next, I feel her epic knockers snuggle around my cock and start to titfuck it. This pushes me directly over the edge and I feel the juices starting to create up inside of me.

“Nina, I am cummmmming” – Nins smirks and continues to titfuck me. My hard cock starts to contract, the first blast is so strong that it splatters over her breasts directly into Nina’s face, which takes her by surprise completely. Two more ropes splash directly on top of her breasts and begin to run down from there. She now jerks off with her hand, which produces a fourth and fifth splash, which also lands on her tits.

At this point she takes my cock in her mouth again and sucks off the last drops that are still running off. Finally, she releases my cock and looks at my creation on her tits.

“Wow, that was a fucking big load”. Nina states with astonishment.

“I’ve never jizzed like that before, you horny Goddess, you drained me completely” The look of her fully coated face and breasts sends a final shock of electricity through my body and I will never forget that picture.

We then dive under the water and put our swimsuits back on.

As we hear a car door on the street, we both have a devilish grin on our lips.

NSFW: yes

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