The sister exchange

[Strangebuddy]

I'm a fan of the mother-daughter exchange club series. So I had a random thought this morning: "what if there was a sister-exchange?"

Which gave me some more odd ideas:

1. Straightforward copy of the original idea: older sister or other twin has a meetup with another set to swap and have lesbian sex.


2. Brothers pimping out their sisters to other guys in exchange for their sisters or guys helping each other have sex with their sisters.

3. Magical element. Brother hates bossy sister and voices his frustrations online. Two seconds later, a genie-like figure shows up offering to help out. He knows a girl who wants out of her family and would be open to a switch. Genie introduces the girl, a gorgeous Latina girl his age who makes no secret all the things she'd be willing to do in exchange for joining his family. Guy barely even waits for the genie to explain how things work before agreeing to it.

Next morning, the girl is in his sister's room and everyone acts like she's his sister. Brother asks for what the girl promised and she gives in immediately, rocking his world. Of course, things start going south quick: the girl is a party animal, does lots of drugs, and brings over guys to fuck her whenever she wants. Brother starts freaking out, realizing that trading in his old sister for a quickie was a bad idea. Genie re-appears, saying he can exchange back but he needs his old sister in the same room as his new one.

Brother is devastated when he suddenly gets a call from his old sister. Turns out she's doing great. Her new family is rich and very loving...though maybe a bit overprotective. Still, she misses her old family and wants to change back. Bro is elated and they schedule a meetup, with him lying to his new sister that there will be a party.

At the meetup, things go from bad to worse. Guys pile out of unmarked vans and kidnap bro and his new sis. Bro gets dragged in front of his old sister and she explains: new sister was originally a cartel boss' daughter. She was a spoiled bitch and her parents tried to come down hard on her. New sister explains she did want to come back but new sis has ruined her reputation and she likes the power she can wield as a crime lord's daughter. She knows the rules of the exchange and isn't going to ever let there be a situation where all three of them are in the same place. She then has her brother get drugs planted on him and gets him arrested while new sis tries to convince her old parents that she's their daughter...they don't believe her and when she slaps the old sister, she gets to see what life is like on her dad's bad side.

 

[Sean Renaud]

To many moving parts and a lot of it seems really random considering the genie seems to just be a random McGuffin at this point not a legit and evil character. Still it's basically written.

 

[Strangebuddy]

Definitely.

Thought up a simpler one:

Guy's twin is part of a student exchange program so she'll spend half of a year or the entire year in another country. Meanwhile, a new student will live with his family. The new student is a gorgeous Swiss student with a figure anyone would die for. She's sweet, nice and very...affectionate. She's adamant about kissing and hugging her exchange family every chance she gets and is always walking around half-naked.

Brother and the rest of the family are shocked but she's so sweet that they don't mind...and the family all doesn't mind watching her cute bum and large breasts shake. Over time, the exchange sister starts being increasingly forward and suggesting ideas that they shouldn't be doing.

Maybe the family succumbs and starts an exchange family gangbang or maybe they resist. Either way , sis comes back a week early and the family thinks the troubles are over. Until brother gets woken up by both girls.

"Hey bro, I really missed you."

"Oh, I missed you too, why's Elsa here?"

"I just wanted to thank her for taking such good care of you...that reminds me, Elsa. Your mom wanted me to give you this."

One make out session later...

"Hey bro, help me out here, Elsa's dad wanted me to give her something but I don't have the right equipment. I'll make it worth your while."

 

[Sean Renaud]

I love this second idea.

And I don't dislike the first one. I just read your set up and I'm seeing a Rube Goldberg Machine.

 

[lovecraft68]

I like the idea that's along the lines of m/d exchange club.

A group of older sister, bring their little sisters(18 of course) to a special sleepover where the older sisters draw the names of the young girls and that's who they play with(obviously they can't draw their own, or we end up in incest.)

 

[Strangebuddy]

Thanks. I get what you're saying though. I guess I wanted to have the brother's comeuppance start before the reversal and for there to be a reason as to why his new sister would be willing to put out. Maybe a different way to do it would be something like:

Guy's sister is always chastising him and interrupting him when he's jerking off. Guy is watching porn one night when one of the models on screen starts talking to him directly. She promises to get rid of his sister and take her place...with lots of side benefits of course. All he needs to do is get a few strands of her hair. Guy is nervous but ends up doing it, figuring it's just a dream, gets a few hairs from her brush, says the chant, and goes to sleep. Next morning, new hotter sister who everyone acts like they've always known. Guy barely has time to even think of his old sister as his new one jumps his bones and makes herself available whenever he wants.

...turns out she's a sex demon. Not quite a succubii but very dangerous. Guy finds a way to trade back and gets his sister back. She pretends to forgive him but later that night, she walks into his room and jerks him off, making a symbol with his cum. Turns out sis made some friends while she was trapped and wants her brother to meet them.

 

[LairOfTheCougar]

Fan of the mother / daughter exchange club series myself.

A couple of good ideas here. I agree that the first one is a bit too busy. The idea of the genie or whatever swapping sisters is viable, I think maybe dropping the second half with the old sister and the cartel subplot would be a good idea.

Possibly rather than a supernatural agent swapping girls, how about a club or society doing it? A club to match young women with families more to their liking and vice versa. It could be a simple informal online community with women trading places or even something more sinister with sexual slavery going on.

The second one is great too. Exchange students for the win. One little note, Switzerland is pretty conservative socially. That could be a plot point, the basic "preacher's daughter going wild" thing or if you wanted use some other country.
The Swiss are also big on guns, even more than the US possibly. You could maybe use that too if you wanted.

 

[Strangebuddy]

I like the idea that's along the lines of m/d exchange club.

A group of older sister, bring their little sisters(18 of course) to a special sleepover where the older sisters draw the names of the young girls and that's who they play with(obviously they can't draw their own, or we end up in incest.)

That's a good idea. Maybe it's posed as a sorority mixer for students who are trying out the next year for the sorority, or maybe a camping trip for older (totally different from Girl Scouts) scouting group, or a smaller meet up. It might be fun for the younger sisters to sometimes be the ones bringing their older sisters along.

 

[Strangebuddy]

Fan of the mother / daughter exchange club series myself.

The second one is great too. Exchange students for the win. One little note, Switzerland is pretty conservative socially. That could be a plot point, the basic "preacher's daughter going wild" thing or if you wanted use some other country.
The Swiss are also big on guns, even more than the US possibly. You could maybe use that too if you wanted.

Got ya. That could be fun, with the girl bonding with her exchange family over guns and her lifestyle either being fully released now that she's away from her home country or maybe her family is just against the norm and keeps things secret.

Of course, other countries is always another way. Maybe she's German or Venezuelan (had an exchange student from there in High School. Partied crazier than anyone else I've ever met). Or maybe sister met her online while discussing her family kink. The two of them bonded and decided to swap so they could seduce each other's families.

 

[MayorReynolds]

I love the initial idea and the suggestions on expanding it. I think it would work best without the magical element. Otherwise go for it, would totally ruin my keyboard.