Chapter 1 — The Neighbor Who Watched Our Marriage

My wife and I like to have sex with the window open.

We live in an apartment.

Like many apartments, our master bedroom connects directly to a balcony through a large window. The balcony runs the full width of the unit, and across from us, through the glass, is the neighboring building.

Our bed is pushed right up against the bedroom window. From across the way, anyone can clearly see the side profile of us lying in bed.

The distance between buildings is somewhat wide—wide enough that you might think no one could see in—but I can clearly make out people walking through the hallway on the opposite side, so there’s no reason they couldn’t be watching us.

Still, I reassured my wife it was fine. “It’s too far,” I told her. “And the glass on our balcony is a bit dirty. They can’t possibly see anything.”

But how could they not see us—lights blazing, windows wide open, bodies moving in full view?

............

We’re both in our 40s.

My wife is generally reserved—dignified in most ways, but shy when it comes to sex.

We used to always make love in the dark. Oral sex was rare—maybe once in a blue moon, if I was lucky.

The idea of having sex with the window open? Unthinkable.

But lately, she’s started to change. Maybe it’s age?

Three things have shifted recently.

First, when I asked to leave the lights on during sex, she agreed without hesitation.

“I want to see your beautiful body,” I whispered. “Let me admire your firm, gorgeous curves…”

Maybe those words sparked something. At our age, most women lose confidence in their bodies—but she seemed to thrive on it.

Second, I’ve started taking pictures of her.

At first, secretly—snapping shots while she slept. If she’d caught me, I’d have been dead meat.

But then, during sex, when she was deep in ecstasy, I asked outright.

And she said yes.

Now I even upload photos to a social media platform.

Third—and most shocking—we began having sex with the window open.

She worried, “What if someone’s watching?” But I kept reassuring her. “No way. They can’t see a thing. Don’t worry.”

We only opened the frosted glass panel, not the clear one. The transparent window stayed shut.

But with the room lit up, the glass turned into a mirror—reflecting our bodies back at us.

“It’s like watching a movie,” she said, getting turned on by the sight of us on display.

Suddenly, we felt young again. Our sex life exploded.

We forgot our age—sometimes three times a week, sometimes every single day.

She was more beautiful than ever.

..............

That night, we were going at it hard.

“Hah… hah…”

“Ah, baby, I love you… ugh… oh… haah…”

“Mmm, I love you too, baby… ugh… I’m dying… oh god…”

We devoured each other fiercely.

Her face flushed that night—so stunning I couldn’t stop kissing it. I trailed my lips down her neck, to her chest.

Her breasts weren’t large, but still so lovely. When I licked them, she moaned louder.

She loves it when I suck her nipples while touching her pussy with my hand.

“Ah, baby, more… more… hmm… I’m so turned on… it feels so good…”

“I love it too… your pussy is amazing. Feels like a virgin’s…”

Of course, she’s not a virgin. We have two kids.

But saying that excites her. And seeing her excitement turns me on even more.

Sometimes, lies are necessary.

“Down there… lick me down there…”

“Where? Your feet?”

“No… there.”

“Where exactly? Say it clearly.”

“My pussy… suck my pussy…”

“Okay…”

Her lower belly was smooth—unbelievable for a mother of two. I kissed past her navel, then slid down into the valley between her thighs.

She had almost no pubic hair. Better—nothing to get in the way of my tongue.

I traced down her skin, diving into that warm cleft.

Inside, there was a small, sensitive nub. Beneath it, another slit—deep, wet, pulling everything in like a hidden trap.

My tongue swept the entire valley—deep inside, then gently teasing her clitoris.

“Mmm… baby… suck… I’m going crazy… ah… ugh… mm… hoh… ah, baby… come inside…”

“What goes where?”

“Your cock… in my pussy. I want your cock filling me up…”

“Okay. My cock is going into your pussy.”

Pffft—

Shhhk—

Shk-shk-shk—

“Turn over.”

She used to hate doggy style. Now she lifts her ass so willingly.

“Your back view is incredible. Better than a model. Seriously, your ass is perfect. Why hide it? I love watching you like this.”

“Then look… do whatever you want…”

I gripped her full hips, lined up, and slid inside.

“Hnnn—”

She was definitely more of a slut now than before.

Someone once said women in their 40s are luxury goods. My wife isn’t the most stunning beauty—but I never realized how exquisite she was in bed.

I deliberately angled us so we’d be clearly visible from outside.

Across the building, only a few lights were on. But someone could still be watching from a dark window.

And I wanted them to.

“Still… are you sure they can’t see us?”

“Of course. It’s too far. Unless they’re using binoculars…”

“What if they are?”

“Worried? Should I close it?”

“No… keep going. It’s fine. They can’t see…”

As we spoke, we shifted positions.

We both lay on our sides—me behind her, thrusting in deep. She lifted one leg high into the air, and I held it up with my hand.

And of course, we faced the window.

The room was bright. Outside, it was dark—so the glass became a mirror, showing us clearly. It looked like a porn scene.

Like a video someone had filmed and uploaded. We were performing flawlessly.

If someone was watching from across the way, they’d see everything—her front, her pussy, all of it.

One leg raised, my cock buried deep inside her. A perfect porn shot.

And then…

I saw it.

A pair of eyes, staring from the opposite window.

I’d suspected someone might be watching.

But I thought they’d only see shadows, shapes.

Now, I saw the eyes—clear, focused, watching us.

Maybe my vision was sharp. But that gaze—it was definitely locked on us.

And suddenly, I got even harder.

“Ah, baby… I’m so turned on…”

“Mmm, me too… keep going… deeper… deeper…”

Pffft… pffft… shk-shk-shk…

“Ah… mm… ahh… baby… mm… you… your… cock… my… pussy… mmm… I’m dying… hhh… yess… ahh…”

She screamed every kind of sound.

Our kids were sleeping in the next room, so she couldn’t shout—but she moaned loud, barely holding back, almost crying out.

“Hah… ahh… mm, yess!”

“Ah… hhh… mmm… yess!”

I came.

.........

Our sex life continued like this.

And so did the neighbor’s watching.

But more importantly…

At some point, my wife started feeling his gaze too.

And she wasn’t just aware of it.

She was enjoying it.

More than me.

More than anyone.

One day, I asked:

“Have you ever slept with another man besides me?”

Even I knew it was a terrible question. So random, I almost wanted to take it back.

“What? You know you’re my first love.”

“I know. But… have you ever wanted to sleep with someone else?”

“Are you crazy? Do you want me to cheat?”

“No, not like that… You know, sometimes during sex, people imagine movie stars—hot, sculpted bodies. Makes it better, right?”

“Men always say they imagine tall, slim women. Have you ever thought of someone else?”

“Haha, not really… but watching a hot movie makes me want you more. If the actress is hot, I get more excited.”

“Hmm. Same for me. Remember that drama Twin Flowers? The actor’s body was amazing. Made me want sex more.”

“So when you saw his body… who did you want to sleep with? Me? Or him?”

“Obviously… you. Haha.”

“Come on~ Be honest. You wanted him, didn’t you?”

I teased with a smile. She laughed too.

“Yeah, I wanted him. What about it?” she joked back.

We laughed.

But I saw the truth.

She wanted to be turned on by the idea of sex with someone else.

“Baby, honestly, I don’t mind. If you’re not excited with me, think of him. Or any other man.

If it turns you on, I get turned on too. It’s still our sex, right?”

“I don’t mind if you think of other women either. Better than your dick not getting hard, right?~^^”

“Wow~ Look at you, missy~^^”

“Why~ What about the woman from next door? Or the one from your office? Both have nice bodies~~?”

She was teasing me—but I felt exposed. How many times had I fantasized about them during sex?

Once, I almost shouted their names while we were going at it.

............

Then one day,

I found a strange letter in the mailbox on the first floor after work.

No stamp—someone had slipped it in by hand.

The moment I opened it, shock and excitement hit me at once.

I apologize for the intrusion.

I’m the man living in unit 000 in the building across from yours.

For several days, I’ve unintentionally witnessed your intimate moments.

First, I offer my apologies.

But from what I’ve seen, you both seem to enjoy being watched.

If you’re open to exposure, you can keep going as you are—I’ll be satisfied.

But would you consider taking it further?

Would you allow me to sleep with your wife just once?

If you refuse, please close your window from now on.

But if you agree, leave your window open tonight, just like yesterday.

I’ll find my own way to your place.

What was I supposed to do with this?

I agonized over it.

Then I showed it to my wife.

I hesitated—maybe I shouldn’t have.

But I thought: What if she gets excited? What if it makes our sex even hotter?

At first, she was shocked, flustered. But I could tell—she was turned on too.

“What a pervert. How would he even get in? But… the idea of someone watching us does turn me on…”

That night, we opened the window and fucked hard, just like before.

“It’s not like he’s actually coming. He’ll probably just watch.”

I said it—but I wanted him to come.

I wanted to feel my wife being taken by another man, like in those pornos.

Had I become a pervert too?

Or was it guilt—because I’d secretly cheated on her before—and now, if she cheated, I’d feel less guilty?

“Baby… what if he actually comes? What do we do?”

“Hmm? Let him have a turn.”

“What? Have a turn at what?”

“What do you think? Your pussy~~”

“God, you’re impossible…”

But I heard it—the tiny tremble in her voice.

“Look, he’s watching us right now.”

“Yeah… I’m getting excited again. Fuck me faster.”

.....................

The next morning, I left for work.

Lately, I’ve been waking up hard—feeling like I’m young again.

That morning, I was erect, so we had quick morning sex—fast, because I was in a rush, and I didn’t want to wake the kids.

We both felt unsatisfied—but we looked forward to tonight.

“Ugh, this is so frustrating. We’re doing it properly tonight~”

“Got it.”

I sent the kids off first, then left the house. My wife was alone.

As she saw me off, she lifted her skirt. No panties.

“See this? I’m still turned on. I’ll be like this till tonight.”

“Haha, so you’re going out pantyless today? I’m gonna be so hard I can’t work~”

“Hahaha”

“Hohoho”

Just thinking about her going pantyless made my cock stir instantly.

I got in the elevator, exited the building.

Then someone familiar walked in.

“Where have I seen you before?”

I passed by without thinking.

Then, as I turned on the car engine, it hit me.

Those eyes—that gaze. It was definitely the man from the other building.

“Shit. He thinks I gave him permission. He’s actually coming…”

I couldn’t go to work.

I called the office—said I had an emergency—and turned back home.

So many thoughts raced through my head.

Block the door? Catch them in the act? Beat him up? See what my wife would do? Call the police?

No. No. How often does a chance like this come?

Should I just let it happen—and watch secretly?

No. There’s no way she’d actually let him touch her. Impossible.

But what if he does rape her? I’ll kill him.

But what if it’s not even him? Then I’ve wasted everything.

The elevator was already on our floor. He had to be the one.

Oh—my wife is wearing no panties!

Why wasn’t the elevator coming down? I sprinted up six flights of stairs.

The hallway was empty. Either he wasn’t here—or he was already inside.

I opened the door quietly. It opened.

A strange man’s shoes in the entryway. It’s him. But where is he?

The bedroom door was open. I heard my wife moaning.

What the hell? Did they already start?

I slipped off my shoes and crept toward the bedroom, peeking in.

He wasn’t there.

But my wife was—masturbating.

Her skirt was pulled up, legs spread. Left hand in her mouth, sucking her fingers. Right hand rubbing her pussy.

“Hnnn… baby… when will your cock come in… ahh… mm… baby…”

I’d never seen her do this before.

Just watching her was enough to turn me on.

But where was he?

Not in the bathroom. Not in the other room.

Hah! The balcony?

The balcony window was open. I crept back to the bedroom door and peeked through the crack.

There he was—on the balcony, staring at my wife through the glass.

And he was taking pictures.

I nearly screamed.

Then he turned—about to come back inside.

I ducked into the bathroom just in time.

He walked quietly through the living room, into the bedroom.

I peeked out slightly, watching.

He walked in, then took my wife’s hand.

“Ah!”

She gasped in shock.

“Ahh!!!”

“Don’t be afraid. I’m not here to hurt you.”

She was so startled, she forgot to pull her skirt down.

She lay on the bed, and he knelt beneath her—her pussy wide open in front of his face.

“You’ve probably guessed—I’m the man from across the way. You got my letter?”

She just nodded, wide-eyed.

“Since you left the window open last night, I assumed you agreed.”

“Agreed…?”

“If not, I misunderstood. I don’t want to force anything. If you say no, I’ll leave.”

He stood up.

Then she called out.

“Wait.”

“Yes?”

“Don’t go. I… waited.”

Hah? Did I hear that right? Waited? For him? She actually waited for him after reading that letter?

“I knew you were watching us. Even before the letter, I wanted to show you—no, to do it with you. When I got the letter, I knew you’d come.

Last night, while making love with my husband, I thought only of you. Would you come today? Or another day? That’s all I thought about.”

“Ah, ma’am…”

“Ma’am? Call me Sarah.”

“Sarah… your body is beautiful. Especially your back view—perfect.”

“Hoho, my husband says the same~”

At this point, they sounded like lovers who’d known each other for years. Their conversation flowed so naturally.

“Oh, look at me.”

She finally noticed her skirt was up—and quickly tried to pull it down.

But he stopped her hand.

“Don’t. You’re going to do it anyway, right?”

“Anyway… going to… do it…”

He pulled her skirt off. Under her T-shirt, her lower body was completely naked.

He ran his hands skillfully—starting from her feet, up her calves, thighs, then gripping her ass.

Each touch made her moan, “Hnnn~”

He brought his face to her lower belly. Licked from her thighs to her groin—then her pussy.

“Hnnn~”

He reached up, squeezing her breasts while licking her. She started losing control.

“Ah, it feels so good… what should I call you?”

“Call me Thomas… ah, Sarah…”

Wait—they were exchanging names? Since when was my wife this bold?

Soon, both were naked. He climbed onto my bed—the bed where only my wife and I had ever made love.

And just like that, he touched her like she was his wife, like he was me.

“Ah, Sarah…”

“Thomas…”

He opened the window—just like I would—and spread her legs toward the glass, fucking her.

“Hah… ah… Thomas… hhh… mmm…”

I walked into the bedroom without realizing it.

They didn’t notice me—too lost in their sex.

My wife saw me first.

“Ahh! Baby!”

“Ah!”

....................

A season has passed since that day.

It was winter then. Now, spring is in full bloom.

Today, my wife and that man are walking hand-in-hand through the park.

They talk, laugh, gaze at each other.

Sometimes she playfully hits his shoulder.

Sometimes they kiss.

I walk behind them, holding another woman’s hand.

“The other woman, don’t they look good together?”

“David, really? You enjoy seeing your wife with another man?”

“Why not? Because she’s with him, I can be with you—without guilt.”

“Haha, true.”

“They’ve been like this about three months now.”

“We’ve been together a year.”

“So we’re the seniors~?”

“Hoho, David… since do this kind of thing have seniors and juniors?”

“Haha, you’re right.”

Then, ahead, my wife calls out.

“Baby! The other woman! Hurry up!”

“Yeah, come on. We’ll go slow,” the woman says.

“Go ahead and book a motel room. I’ll be there.”

I shout.

Now, we’re a 2-on-2 couple.

We’re on our way to the motel.

I wonder how we’ll pleasure each other tonight?