I would like to thank flim62 for his help on this story. A set of eyes that is not invested in the story helps a lot.
-----------
My older sister Madison called and said we needed to talk about our mother. We met for coffee halfway between her house in Northwest Indiana and mine in Indianapolis. Madison told me that Mom was getting to the point where she needed more help than any one of us could give her at home. Mom didn't need a nursing home, but she did need to go into assisted living.
Madison had done some research and found that Dad had contributed enough to one of the fraternal organizations to which he belonged that Mom was eligible to enter their home at minimal cost to us. The problem was that we need to bring her and her stuff back from Florida. Madison did not want Mom in a car for all those hours.
"Would you mind driving you and me down there in your van and packing Mom's stuff up and then driving back? I would bring Mom back on a plane. You'd be driving back alone." Madison explained her plan.
"I've got no problem with that" I replied. "When do we go?"
"Would next Thursday be too soon?" Madison was almost pleading.
"No problem, I can be ready" I assured her.
That's the way we left it.
The next Wednesday evening I met Madison and my brother-in-law, Rob, at the same coffee shop. We loaded her stuff into my van and said our goodbyes.
We left my house at 5:00 the next morning. We got to Louisville and I asked Madison if she wanted to go through Nashville or Knoxville.
"I love the mountains and there are more on the way to Knoxville" she responded.
"OK, Knoxville it is" I said.
We had gotten just past what I found out later was the last exit in Kentucky on Interstate 75. The traffic stopped dead. Both lanes, no movement. We figured it would be no problem and not last very long.
After about an hour we realized this was probably going to last awhile. We started talking about different things, but, after some time the conversation turned to sex. I still don't know how that happened; this was my sister for Chrissake.
My side of the conversation was very limited, as was my experience. I had married young and had sex with one other girl than my wife. While my wife was not frigid, the rules were very distinct. I would eat her, but, she would not blow me. Sex was very regimented, I would rub her back until she sensed I was at a boiling point, then she would roll over and I would eat her to orgasm and then, and only then, was I allowed to fuck her. I would go as long as I could and then she would invariably say that I was too heavy and grab my balls. She would then massage my balls until I came and then she would push me off her. I was then expected to get a towel and bring it to her so she could clean up, all while not dripping on the carpet. Then I could clean myself up. She would be asleep by the time I got back into bed. Thrilling.
Madison, however, was a revelation. Madison's husband, Rob, apparently was a sex maniac. Shortly after they got married Madison caught him cheating. He came home very early one morning and he smelled like sex. When she confronted him he told her that he couldn't help himself. He loved women and he had to have as much variety as he could get.
Rob told her that he loved her and would understand if she left him. But, he really wanted her to stay and maybe try some different things.
"Different?" I asked.
"Yeah, he wanted me to go with him to swing parties. Evidently, there were some that he could not attend without me" she explained.
"Did you go?" I asked.
"No, I didn't, not right away. Do you remember when I 'Went back to school' a couple of years ago?" Madison asked me.
"Yeah" I answered.
"I needed to get away from Rob and think about it, so, I moved in with Tricia and Cole." Madison explained. "I asked Tricia and Cole not to say anything to anyone."
Tricia's our sister who is halfway between Madison and I in age, Cole is Tricia's husband.
"After I had been at Tricia's a while, I decided I really loved Rob and would try to do what he wanted. So I moved back home" Madison was explaining. "We went to our first party shortly after I returned home. I was really nervous and I didn't know what to expect. Rob told me to put on a short, light dress with no underwear. That made me even more nervous. Rob told me not to worry; there would PROBABLY not be anyone that we knew."
"Probably?" I asked.
She continued, "Yeah, that's what I thought, like 'uh oh'. Rob explained that all the people there would be married couples. It would not necessarily be straight swaps."
"What do you mean, 'straight swaps'?" I asked.
"Oh, that's where I would go with a guy; let's say Gary, and Rob would go with Gary's wife." Madison explained. "We would just hook up with whomever we wanted. The couples would then usually go to the man's house. It wasn't sexist; it was just a means of keeping uncomfortable situations to a minimum."
"Oh, I guess I understand" I said.
"Anyway, we got to the party and it seemed like just a normal party. I didn't see anyone I knew and there didn't seem to be anybody fooling around that I could see." Madison said. "Rob saw this redhead and took off and left me standing there."
"That was cold" I said. "He couldn't wait to get his cock going, could he?"
"Yes and no. He knew how these things went, and he wanted to get to that redhead early before she left with someone else. Apparently, she only went to these couples only parties and Rob had been lusting after her for some time." Madison explained, only now she was hanging her head.
I began to think that Madison realized how bad this sounded, once she said it out loud.
"Have you ever told any one about this before?" I asked.
"No" Madison answered softly.
"Is this embarrassing you?" I asked. "I don't have to hear it, you know."
"Again, yes and no" Madison said. "I think I need to tell someone and I have already started and I want to get it out."
"OK" I said.
So she told her story.
---------------------------------------------
We were getting ready for the party and Rob was suggesting things for me to wear. Just about everything I took out, he would frown and shake his head. I finally took out a short frilly dress that bounced when I walked.
Rob said "That's cute and REALLY sexy, wear that."
I started to get some different underwear out and again Rob shook his head.
"You don't want to wear any underwear. It just gets in the way and then more than likely you will lose it." Rob explained.
"But this is so short it will show my bare ass." I complained.
"That's the point. Do you have a garter belt and stockings? That would top it off great." Rob grinned lewdly.
"Look, I'm doing this to try to save our marriage, don't try to make me into a slut. This can stop, right here, right now." I said.
"OK, OK, sorry." Rob mumbled.
We left and went to an expensive part of town and stopped at a house that I didn't know. There were maybe fifteen to twenty cars outside. Rob was a gentleman and opened my door, but he nearly ran up to the house and inside. He was gone with the redhead before I knew it.
I walked around this house and there were all kinds of people there. It seemed like most of them knew one another. Several men came up and tried to talk to me but I would just shake my head and walk away. I sat down in the corner by myself and just watched. Pretty soon this guy came over and sat down.
He commented that I looked scared and wondered if it was my first time at one of these parties. I told him it was and I wasn't sure I could do anything so he probably wanted to look for someone else.
Then he surprised me and asked "Are you Rob's wife, Madison?"
"Why did you guess that I was Madison?" I asked.
"The redhead is my wife Victoria. We are here tonight because you and Rob are here" he explained.
Apparently, the redhead, Victoria, wanted Rob as much as he wanted her. The problem was that Victoria had a deal with Barry, that's his name, that she would not go alone to the parties. Just like us.
"Do you want to leave here?" Barry asked me.
"I'm not sure I'm ready for any of this" I responded.
He just smiled and told me not to worry; he just figured I would not want to see Rob and Victoria together. He was right, so we left.
We went to Barry's house to be alone. We went into the family room and Barry lit a fire and lit some candles.
"Barry, are you trying to seduce me?" I asked.
He just laughed and left the room. I sat down on the leather couch and stared into the fire. Barry came back and handed me a glass of wine.
"So, you ARE trying to seduce me!" I said.
He laughed again and sat next to me but didn't touch me. We sat there quietly for a few minutes and then he put his hand on my bare leg. I jumped a little, but, didn't stop him.
He pushed the hem of my skirt up a little and then leaned over and kissed my thigh. He was so gentle; it was like he was barely touching me with his lips. He sat up and kissed me on the lips the same way. While he was kissing me he moved his hand so his fingers were just touching my belly next to my thigh. He left his hand there while he continued to kiss me. His tongue parted my lips and I let it in. He lifted his hand to my breast and just gently rubbed the nipple. I was getting wet and didn't realize that I had opened my legs. My hips were slightly humping and he dropped he hand down.
His fingers dropped down to my pussy and I was dripping wet. He slid a finger in and I threw my head back and gasped. I put my wine down and grabbed the hem of my dress and pulled it over my head. I was completely naked.
I don't know why I did that. I had never been naked in front of anyone other than Rob. I was just crazy. I grabbed Barry's hand and pulled it up into my pussy and started grinding on it.
When I did that I started cumming like I had never come before. I pushed Barry away and stood up and faced him. I dropped to my knees and started fumbling with his belt. I looked up at him and the look on his face was priceless. He was half aroused and half amazed.
Barry grabbed my hands and pushed them away. He then unbuckled his pants and stood. His pants fell to the floor and then he pushed his underwear down. I pushed him to the couch and grabbed his cock. He was hard and had pre-come dripping off the end. I took him in my mouth and all the way into my throat. I had NEVER done that before. I closed my mouth and sucked his dick all the way as I backed off. I pushed my head back down and his cock went all the way into my throat again. I didn't gag and it felt wonderful.
I stood up and spun around. I sat down on his lap and his wonderful cock slid easily all the way into my cunt. He reached around me and grabbed my tits. I screamed as I was humping his cock. I grabbed his hands and twisted my nipples with his fingers so he would know what I wanted. I was like a madwoman. I was banging him as hard as I could. I started coming again. I heard him say something against my back, so I stopped and asked him what he said. He said 'don't stop, don't stop, I'm coming'. So I went back to fucking his and my brains out.
Madison stopped talking at that point. She threw her head back and started shaking all over.
------------------------------------------------
Holy shit, she had just talked herself into an orgasm. My cock was so hard it hurt. I sat there and watched my sister have an outrageous orgasm. She just shook and shook.