The August sun was bathing my skin. Sarah was on a blanket in her yard below me, lying out in the green grass by her pool. She was relaxing on her stomach, with her head resting on her arms, while the sun turned her skin to a deep, oily bronze. I’d been watching Sarah play for almost a month, and my body was starting to tan from the time spent naked in my window.

My wife hadn’t said anything yet, but sooner or later she was going to wonder why the tan on my cock left the flesh on my back a pale white. That was going to be an awkward conversation. Heather was a remarkably open minded woman, but not that open minded. That was a worry for another time.

Lighting a cigarette, I inhaled the acrid smoke while gazing down at the nude teen laying out in her yard. We’d both already cum, and my cock was refusing natures compulsion to become flaccid, dangling like a pendulum even as a bit of residual jizz was oozing from its head.

“Damn, she’s beautiful,” I marveled for the countless time. We’d repeated this game almost every weekday since we first started our mutual masturbations and I still found it difficult to to walk away while she was enjoying her nude time in the sun. I was hooked on her, and I wanted far more, but I knew even this would soon pass. Once the weather cooled, she would end our summertime pleasure. By the next summer, well, life happens. Our secret was marked by an hourglass of bliss, and the sands were quickly running out.

I had no illusions of our future. Sarah was clear that this was nothing but two people sharing a voyeuristic pleasure. Besides, she was still seventeen, so any physical contact with her would be much more dangerous for me than this already was.

My gaze traveled up her sharply, slightly parted legs, over her ass and up her tapered back. My cock was growing by the time I finished my smoke and after crushing the but, I took it back in hand and began to stroke, savoring the moment while I could.

oo0oo

It was Saturday morning when I received one of her rare texts. These had become a special, but terrifying treat, and I went into my bathroom so Heather wouldn’t see me reading it.

Hi, Jack. My parents are going away from the weekend, so I have something special planned. My boyfriend is coming over tonight and I’m hoping I can get him to skinny dip in the pool. With any luck, you might get to see something more. I hope so, the idea of being watched while with him is making me excited. You can’t turn on any lights, which sucks. I won’t be able to see you but, just knowing you’re there will be hot. And it will give me something to think about for awhile. I’ll let you know when.

Xoxo Sarah

Holy fucking shit! A flush of heat exploded in my blood and my cock hardend, becoming uncomfortably tight in my jeans. The idea she’d want me to watch her have sex with her boyfriend was a huge escalation in our game.

But, there was the problem of Heather. Unlike our afternoon playtime, Heather would be home. How could I disappear into my dark bedroom with her in the house? Sarah would be disappointed, no doubt, but I couldn’t just go upstairs and jack off in the dark to our neighbors daughter having sex outside my window while my wife was home. But damn, I wanted to, desperately. Probably more than she wanted me to be there.

By evening I still had no idea what to do. Fears I might upset Sarah were nothing compared to the horrific thought of being caught by my wife openly stoking in the window. As the time ticked on, I waited nervously for my silenced phone to buzz in my pocket. I’d just about decided it wasn’t going to happen when my phone vibrated.

We’re are going for a swim now, Jack. I hope you are watching!

Swallowing hard, the thought flashed in my mind that this girl was going to be my doom.

My thoughts were swirling with fear and lust. It was madness to even consider it, but Sarah’s attraction was like gravity, and I felt myself losing my grip on common sense. I knew I wouldn’t be able to get myself off while watching, but I needed to at least see her with him. I waited a few minutes, knowing there would be some time before things got serious next door.

Eventually, lust won over fear. Telling Heather I was going to change into my sweat pants, I hurried up the stairs to spend whatever time I dared by my open bedroom window.

It was dark in my room. And with no outside lights, the moonless night swallowed the side of my home in a deep blackness that would be impenetrable from the lighted pool in the yard next door. Below, me Sarah and her boyfriend were at the edge of the pool, with her sitting on the edge and him between her thighs. I could clearly see her wet, naked breasts in the bluish light and I knew neither of them wear wearing anything else.

Sarah was facing me, glancing now and then beyond her boyfriend toward my window. I knew she was looking for some sign that I might be there. On in an impulse, I lifted my phone and turned it on for a moment, moving it just enough for her to see, before darkening the screen again.

Sarah’s eyes grew bright, and she waved subtly behind his back while burying his face in her boobs. The effect on me was overpowering. She’d brought me into this intimate encounter, just as surly as if I’d been invited into her bed. My cock sprang up, throbbing insistently to be free of confinement in my jeans.

They were kissing now, passionately as she guided his hand between her thighs. Her head jerked back, no doubt in hot reaction to his touch. Her eyes flicked from him to me several times as he played in her heated juices. Soon, she rose from the pool, leading him to the grassy yard that was the stage for our afternoon games.

My cock was uncomfortably cramped by then, and I took the moment to retrieve my sweat pants from the dresser and removed my jeans. My cock was hard and rampant, and I tucked it into the gray cloth before rushing back to the window.

The boyfriend had lit a number of tiki lamps placed at the lawns edge while Sarah reclined, naked on the grass. I was back at the window, just in time to see him approach her, his hard member in hand, as she rose to her knees in front of him. When Sarah took his cock and gave him a few, tentative strokes, I groaned in frustrated need.

There was a hungry smile on her face as she licked her lips, before taking him into her mouth. I was watching in lurid fascination as she sucked him, bobbing on his rod while her rocked his hips in front of her. I imagined it was my cock in her succulent embrace and could almost feel her lips on my skin.

It was too much. My cock was in my hand before I knew it, pulling on it in time with the bobbing of her head. I could have cum right then, but I wanted, needed, to see him fuck her on the ground.

Then, it happened. Sarah reclined, giving me a side view as he moved over her. My heart was pounding and my hand squeezing my iron hard cock when my bedroom door suddenly opened!

“Jack, why are you hiding in here in the dark?”

OH, SHIT!

Fuck, there was I was, caught by my wife with my hard cock in hand, peering out the window! Despite the darkness, I was silhouetted by the incoming light, jacking off like a horny teen. My mind raced and I panicked when she reached for the light switch.

“No, don’t, she’ll see me!,” I whispered harshly.

It took a moment for her eyes to adjust, but recognition of what I was doing quickly flashed in her eyes. “What the hell are you doing? Whose going to see you?”

Fortunately, Heather matched my whisper, but moved quickly to the window to see what I’d been jacking off over. By then, Sarah was being ridden hard by her boyfriend, his ass flexing noticeably as her drove his dick into her.

I was almost shaking in fear, certain Heather was going to explode. Yet my cock refused to get soft. For a long moment, she stared in shock as the two fucked in apparent oblivion at us watching from above. Finally, without turning, Heather reached out and wrapped her around my cock.

“That’s hot,” she said softly, her voice now husky with desire. “No wonder you were up here so long.”

I didn’t dare say anything. Heather clearly thought I’d discovered them by luck, and as long as she wanted to play with my dick, I wasn’t going to ruin it by being stupid.

Heather watched them, her breathing increasing as her nipples began poking through her blouse. Moving behind her I pressed my straining cock against her ass and held her boob from behind. Heather moaned, turning her head long enough to kiss me passionately.

In that moment, I was the luckiest son of a bitch on the planet. What could have been a catastrophic divorce was turning into the most erotic moment in my life. Heather was hot, not with anger, but lust. I wasn’t about to let this chance go to waste. Nuzzling her neck, I was swaying with her as we both stood transfixed at the scene below.

“Hold the bottom of the sill,” I murmured , urging her over and dragging her hips back until she was bent over, her ass placed right on my crotch. Heather complied silently, urgently, wiggling her hips as I dragged her pants and panties down her thighs.

We were both hurried, fervent and needy as I moved behind her. We had no more need of foreplay. She was ready and wet when I drove my cock into her from behind.

Heather gasped, gripping the window as I began sliding into her. By then, Sarah was on her knees, taking his cock almost as hard as Heather was taking mine. We could hear his grunts and see flashes of his member as he pulled back and slammed back into Sarah’s slim body. Pulling Heather's hair, I fucked her like an animal in rut.

The boyfriend finished before I could, pulling out of the her seventeen year old body and squirting his cum all over her back. All the while, I continued to fuck my wife as she rubbed her clit from between her thighs. Seconds later, her pussy tightened, squeezing me in pulses as she came on my iron-hard rod. When the teens collapsed, I picked Heather up by her waist and threw her toward the bed.

Heather’s eyes were wild as she rose to her knees and reached for my cock. “Come here, Jack, I want to taste me on you.”

Wasting no time, she inhaled my length, sucking me ferociously as saliva dripped from her lips. My balls churned and my gut flexed as cum boiled up, shooting hot jizz into her mouth.