(PLEASE NOTE: Please take a look at my kinklist for more information on my kinks and limits. This prompt contains mom/son [and possibly brother/sister] incest. I am very much open to changing the names of the characters, so please do not feel obligated to use the names I used in the prompt. I am open to setting things up through Reddit PMs, Reddit Chat or Discord, but I would prefer to RP through either Reddit PMs or Discord. Thanks!)

The signs were there; I’m surprised you didn’t notice them.

It started a couple weeks into the summer. Even though Samantha had taken an internship a two-hour drive away, she still found reasons to come home each weekend. The first couple of weekends, she claimed she “forgot something” at the house. Then, it became she “had plans with her friends.” Soon, she just stopped giving explanations. She was just coming home.

Every weekend, you’d see us hanging out together. One day, we would be in the pool, playfully splashing water at each other. The next, we’d be watching TV in the living room, with either her legs over my lap or her head resting on my shoulder.

You couldn’t recall Sammie and I being that close growing up, so what changed?

One Saturday night, you got your answer.

I don’t know what tipped you off – perhaps it was the squeaking sound of ever-so-slightly moving furniture coming from downstairs or Sammie’s moans (I learned early on that she could get a little loud at times.) Whatever the case, you quietly rolled out of bed as to not stir Dad from his slumber, slipped on your robe and stealthily crept downstairs. From your vantage point on the staircase landing, the glow coming from the TV allowed you to see all that you needed to see.

Sammie was on her knees on the couch, facing the wall. The fingers on her right hand latched around the back of the couch. I stood behind my older sister and thrust my hips roughly, forcing my hips to repeatedly bounce off her bubble butt while drilling as much of my cock inside her as she could take.

In the middle of our incestuous romp, I heard something. It was enough for me to turn and look back toward the staircase.

I found myself looking at you while you looked at us.

Yet instead of recoiling in horror and contemplating how I wrecked the family dynamic, I continued to pound into Sammie…and grinned up at your direction. It was a knowing grin, a cocky grin, a “you could get this too, if you wanted” grin. I hoped you could see it.

You looked on for another moment or two, then to my surprise, you made your way back up the steps. In the meantime, getting caught by you took me to a new level of arousal, and Sammie’s guttural grunts signified her approval as I slammed into her as hard as I possibly could.

After we finished, cleaned up and went our separate ways to bed, Sammie none the wiser about your finding us, I saw my phone blinking with a notification. The text from you couldn’t have been clearer:

We need to talk.

Something told me that wasn't all we 'needed' to do.

Hello!

I'm looking for a female partner to play a mother who stumbles upon her son and daughter having sex in the living room one evening.

Is she upset that her offspring are doing the unthinkable under her own roof, punctuated by her son's cocky grin back at her while doing the deed? Or did she find herself turned on by his swagger and want to find out what he's all about?

How will the son handle this new affair? Will he try to keep his sister from knowing about he and their mom, or will he attempt to get both in an unforgettable threesome?

We can discuss all of this and more!

If you’re interested, please PM me with your kinks and limits. While you can see all my kinks and limits in the kinklist above, I would like to include the following kinks throughout the course of the story:

Incest
Clothed sex
Cheating
Foreplay (kissing, oral, rimming)
Rough sex (hair-pulling, spanking, hands around mouth/throat)
Loud sex

I don’t have a specific look in mind for the mom or sister, so if you do, please let me know! However, if you like to use picture references, I ask that you please not use ordinary people. I feel much more comfortable with using celebrity or pornstar faceclaims.

Finally, please do not jump into the story right away. I would like to take some time to discuss characters, the story and our kinks so we can get a feel for each other before beginning!

Thanks for stopping by, and I look forward to writing with you soon!