Throwaway8956859 11:24
Eric Swanson!

My mind reels when the Reddit chat pops up with my name [author's note: not my real name]. This is my fuck-around account and not really something I want people I know to see.

phasma_sum 11:30
Sorry, don't know who that is.

I check their profile and see that it is all of today old. Dammit.

Throwaway8956859 11:31
Sure you don't. You just have naked shower pictures in his bathroom?

This is not good. Few people have used our upstairs bathroom. I open my door and look down the hallway. My wife is on the phone working from home today. I shuffle by to the bathroom and look over her shoulder. Not on Reddit. Uh-oh. That would have been fun if she found me.

phasma_sum 11:34
Okay. Fine. Just tell me who you are.

Throwaway8956859 11:35
That's no fun. Your posts are fun, though. I had guessed you were the kinky one in the relationship.

My stomach is dropping.

phasma_sum 11:36
How did you find me?

Throwaway8956859 11:37
Just going through a few of my favorite subreddits last night and something was familiar about your shower picture. It bugged me and I came back to it. When I looked up your profile, I knew it was you.

phasma_sum 11:38
Now what?

phasma_sum 11:45
Hello?

phasma_sum 11:50
Seriously?

Needless to say, I was a bit of a wreck. Should I delete my 11-year-old account?! Just clear all the content off of it? Even though my wife said I can have fun online, this person knows me in real life, which is a big no-no. Worse than that, she -- wait, I was assuming it was a woman -- he or she has been in my bathroom enough to recognize the master bath. That means . . . close friend or family member.

I didn't post the rest of the week. My mind did wander, though, naively thinking this may actually work out in my favor if it is the right person. Since my wife didn't bring it up to me, I was pretty sure it was no-one who was going to make trouble.

By Friday we were off to the in-laws for the weekend. My wife, L., comes from a big family and our kids love playing with all the cousins. We got in early and the kids ran off to play in the finished basement. Since we had a few hours till folks showed up, I decided to get a quick run in. It is warming up and by the time I got back I was a sweaty mess. My wife said I should go hop in the shower with a wink.

In the upstairs bathroom I stripped off my sweaty clothes, setting them to the side as the water warmed up. I was already half hard, thinking that she might be paying me a visit in the shower shortly. I thought about taking a quick picture to post on r/Shower_nsfw but then the sword of Damocles came back to me. No posting till I figure this out.

I hopped in the shower and stood a little while, letting the hot water run over me. My mind reached back to previous showers where I wasn't alone, and before long I had a handful of suds stroking my cock. I hear the door click.

"You're a ghost, huh?"

I freeze as I hear my sister-in-law's voice. "What?"

"Phasma sum. That's Latin, right?"

I don't answer.

"You should be glad it was me that found your account."

I see her outline approach the shower curtain.

"She really lets you have online friends with benefits?"

"Yes," I manage.

"Has she seen your posts?"

I don't answer.

"That's what I thought."

I see her arm rise up and slide the curtain aside. Our eyes meet and then she looks me up and down. I don't need to look. My wife's older sister, C., is shorter than her, curvier, too. I had seen her in workout clothes recently and have to admit to fantasizing about her more than once. By now my hand had fallen away and I had started to lose hardness. But I could feel bloodflow returning as I felt her eyes on me. Her eyes came back to mine.

"I can see part of you likes the attention. I always wondered what you looked like under those shorts."

"I don't know what to say."

"You don't have to say anything. Probably better if you don't. But if you want to keep your posts private, you should probably keep me happy."

"I'll just delete them."

"Screenshots," she smirked.

"L. might be here any second."

"You had better hurry up then."

"What? With what?"

"What you were doing when I came in here."

"You want me to . . ."

"Yeah. I read your story about jerking off in front of a work flirt." I could see her flush a little and her eyes flick downward again. "It was really hot. Did that happen?"

I felt my cock throb and bounce, giving me away.

"Better get to it." She shed her hooded sweatshirt, revealing just a sports bra and yoga pants. She leaned back against the vanity.I consider my options but figure I've been pretty pent up this week and I had already been close. It should be quick.

"If I do this, it is the end of it? Your mouth stays shut?" My hand grips my cock and starts to move. Her eyes are drawn to the motion for a few seconds before she responds.

"You want me to keep my mouth shut?" She licks her lips and then bites the lower one between her teeth. She waggles her eyebrows at me.

"Shut up," I say as I start to stroke. Her head tips to the side as her hands grip her upper thighs. I stare at her chest and concentrate on how it rise and falls with her breath. Before long I feel I am close. As I pass the point of no return her hand pops up, holding her phone. I see her smiling as she alternates between her screen and me as I cum a few strong ropes, shooting out of the shower onto the bathmat.

"What a mess," she says, pulling her sweatshirt back on.

"You had better delete that."

"You're not in a position to ask for that. Better get this cleaned up." With that she slips out of the bathroom.

I'm trying to wipe the cum off the rug when the door opens again and my wife comes in. I feel awkward to say the least, as I'm bent over half out of the running shower scrubbing the bathmat.

"What the hell are you doing?"

"I . . . uh . . . some soap got on the rug and I wanted to get it up."

She gives me a sidelong look.

"You had better hurry up. We need help prepping dinner. You're not finished yet?"

I swallow the lump in my throat. "I thought you were going to join me. What was the wink?"

"Oh, that was just I thought you were cute and you should enjoy your shower. Looks like you already did." She is looking down at my cock, which is still thick but going down.

"Uh, yeah, it got away from me."

She exits and I get out, dried off, and dressed quickly.

The evening passes with just a few incidents. My sister-in-law was also helping prep dinner and kept passing me things across the kitchen island. Her sweatshirt zipped down enough to show her cleavage when she bent forward. She would catch me looking and tsk tsk me.

She sat across from me at dinner and as I went to take a drink, I felt a foot snake up my thigh, gripping me through my pants with her toes. I nearly choked on my drink, trying not to spit it all over the table. My wife slapped my back and asked if I am okay.

My sister-in-law gives this big, innocent-looking expression and asks if I'm okay, too. I start to glare and she raises an eyebrow.

"No, no, sorry." I stammer. "I'm fine."

We finish dinner and I try to avoid eye contact because C. is smirking at me.

After dinner, C. sends her husband upstairs with the kids to get them ready for bed and asks L. to send me to help her carry their stuff out to the car.

I'm carrying the first load out when I see her bent over, pushing stuff deep into the cargo area of their SUV. She sees me and wiggles her hips. She turns around as I unload the boxes.

"I've been thinking. It'd be a shame for your posts to stop, so to keep me happy, you'll post what I tell you. Starting with this." She pulls out her phone and a second later mine buzzes in my pocket.

"I think you know what that is."

I grimace but nod.

"Oh, don't be down about this. Here. Look me in the eyes." I do and see she has unzipped her sweatshirt again, her finger tracing the inside cleavage of her right breast. "Tell me you're not going to fantasize about this tonight."

I look away.

"No, look at me and say it and I'll stop."

My mouth opens, about to lie. I take a deep breath and still can't get it out.

"See. I knew it. And why don't you tell me through the chat after you have. And after posting the video, why don't you write this up as one of your little stories."

I nod.

"Good. Now go get the rest of our stuff." As I turn I feel her hand squeeze my ass. I freeze and then go back inside.

She was right. Later that night, I accidentally woke my wife up as I was cumming after frantically masturbating thinking about C.

phasma_sum 00:05
You were right.

Throwaway8956859 00:06
I know. And the video was helpful for me tonight, so thanks.

phasma_sum 00:07
Don't mention it.

Throwaway8956859 00:08
Very funny and that's up to you. G'Night.