When Natalie and I got outside Dan's flat, the sun was beginning to rise. We climbed the steps to the street and I called for a cab on my mobile phone. It was Friday night and they were busy but said they would get a car to us when they could, although it may be up to an hour. We arranged for it to pick us up on the street corner, not far from Dan’s flat. Still giggling, Natalie said she would text a friend to see if she could stay at her place, where the taxi could drop her off. But she quickly realised she had left her mobile phone in Dan’s flat. I told her to wait on the street for the cab and I would go back to collect the phone.

I walked the short distance back to Dan’s front steps and went round the side to the flat’s entrance. I thought better of ringing the doorbell and risk waking the whole street as I figured it may only anger Sara further. I decided instead to tap on the window to the bedroom. Going around the side gate, I turned into the garden and approached Dan’s bedroom window. The light was still on inside. Just as I was about to tap on the glass, I saw something through a thin crack in the curtains that led me to stop in my tracks…

Dan was standing in the middle of the room with his back to the wall, still dressed in T-shirt and shorts. Kneeling on the floor in front of him was his girlfriend Sara, stark naked. The button hole of Dan’s boxer shorts was open and the most enormous hard cock was angrily sticking out through the opening. I had never seen Dan naked before, let alone in this aroused state and I was quite staggered by the size of his erection. It looked as thick as his wrist.

I pressed my eye closer to the glass and kept perfectly still, mesmerised by the scene, as Sara took the head of this enormous thing into her mouth and with her hand started to furiously pump it back and forth. The two of them must have been turned on by events from earlier because they were going at it like wild animals with Dan vigorously fucking his girlfriend’s face while she urgently wanked and sucked him. It was an awesomely dirty display.

Any desire to disturb the couple at this juncture had left me and, being careful to keep an eye on the slim, restricted view I had through the curtains, I put a hand into my jeans and started to stroke my cock. Dan had meanwhile lifted Sara to standing and positioned her face-first against the wall. This lent me a stunning view of her naked ass. It was a tiny peach of a thing, all pert and innocent looking. She arched her back and walked her feet out, sliding her arms down the wall, until she was in a standing doggy position, her cute little rear end sticking up in the air. Dan disappeared from view momentarily but returned on his knees and buried his face in her snatch, slobbering hungrily at it as she fucked her little bottom up and down on his face.

This was getting better by the second. I unbuttoned my jeans and pushed them down until they were riding beneath my backside. My cock felt electrified as it met the cool, early morning air. Masturbating myself carefully and slowly - I was already dangerously close to blowing my second load of the night - I continued to watch the sexy display of my two friends.

Dan was standing again now and had positioned his huge cock at the rear entrance to Sara’s pussy. It was a beautifully filthy sight. His penis looked gargantuan in front of her cute little backside. He lost no time in burying its head (which was about all that would fit) between her pink cunt lips and started to fuck her frantically like a helpless dog, his buttocks darting back and forth.

The two of them frustratingly kept disappearing from my view but I fixed my eye as steady as I could on the thin gap in the curtains, whilst continuing to play with myself. Then suddenly I was startled by a voice from behind…

“What are you doing out here?”.

It was Natalie.

She noticed my bare ass.

“What IS the matter with you?”, she said.

I quickly pulled my trousers up. She was smiling but looked somewhat exasperated. “Did you get my phone? What are you looking at?”.

She came closer until her head was level with mine and followed my gaze through the gap in the curtains. Inside we could see Dan’s backside still wildly pumping away, his thick erection disappearing in and out of Sara’s cunt. Natalie was as transfixed as I had been.

“We shouldn’t be watching this”, she said quietly, but made no move to stop.

“Let’s just wait til they’re finished”, I whispered, “we can’t interrupt them now”.

Natalie said nothing and we both remained watching, frozen like statues.

A few moments later, I was surprised to feel Natalie’s hand reach down for my jeans. She popped the top button open and slid her fingers inside, taking my stiff cock in her hand. I knew I was going to cum instantly if she jerked me off yet so I stopped her and repositioned my body behind her instead. I roughly pulled her pink pyjama bottoms down until they were half way around her legs and exposed her olive-skinned ass to the outside air. Placing my hand between her legs, I turned the fingers upward so they met with the moist lips of her cunt, and I began to rub the whole area, making it wetter and wetter. She let out little gasps and bucked her hips against me. Our bodies were pressed tight against the wall and we continued to watch together through the gap in the curtains.

Soon Natalie seemed close to cumming on my hand. I increased the speed of my fingers and she clutched at the wall, letting out sexy little panting noises, like an overheated dog. Meanwhile inside the room we saw (and heard) Dan roar with delight as he pulled his big cock out of Sara’s very slippery-looking pussy. Copious streams of sperm shot out of him, one after another, across the cheeks of Sara’s ass. It was a legendary sight watching his huge erection gushing like a fountain all over his naked girlfriend’s bottom. Natalie was seeing Dan’s cock for the first time in its full glory as the waves of her orgasm began to hit her. She came in virtual unison to him.

When her body relaxed against my hand, and seeing as I was the only one left who hadn’t been relieved, I pulled my jeans down and lifted my cock out again. Just touching it once was enough to tip me over the edge and without warning, Natalie felt a sudden jet of my hot spunk splash against her tanned buttock. The pleasure was insane. Using my hand to wank the rest out, a second shot went straight between her legs, splashing against her sticky pink cunt lips which I could now see vividly in the light of the rising sun. She turned quickly as it spat out another load. Seeming disappointed she had not had the chance to bring me off herself, she quickly lowered her face to my cock, her tongue sticking out and her mouth wide open. I wanked a fourth wad of cum right over her tongue, another on her neck and two more over her sweater and jacket.

At that moment, the curtains in Dan’s room shot open and a now-dressed Dan and Sara stood looking in astonishment at the two of us in the garden - Natalie, crouched down with my cock in front of her face, covered in sperm, with her pyjama bottoms around her ankles; and me, precariously balanced on my toes in front of her, towering over. We each met eyes with one another and froze in horror.

“…Natalie left her phone inside”, I eventually said, as if this might go some way to innocently justify the situation.

I saw a definite smirk on Dan’s face and, within a few seconds, all of us, even Sara, began to laugh.

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