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Sister Helps Brother Exercise (teens, inc)
by littlejohn (address withheld)

***

One morning when the house was empty with just my sister I decided 
to do push ups and sit-ups. My sister walked in as I was doing sit 
ups with my resistant band. Hey brother want a hand? Sure I said 
and she came over and sat on my lap grabbing the resistant band. 
That's when everything started.

***

One Saturday morning my mom and dad decided to go out leaving me 
and my sister alone. I was watching cartoons and wondering what I 
was going to do cause there was nothing happening in town. 

My sister Gina was just watching TV too wearing those little 
shorts she always wears and the tank top shirt. Gina 13 5'6' 125 
pounds very sexy for her age. I was the big 6'4' 270 football 
player. She played softball and we were basically an athletic 
family. So as I was trying to wake up she came into my room and 
said mom and dad are gone so I am going to be in the living room 
watching TV. 

Ok I said and she shut the door and I started to get out of bed. I 
walked into the bathroom and washed up then went to the kitchen to 
get some cereal when I had ran in to her again she was bending 
over to get the flour from the pantry. I said hey nice shorts and 
she smiled. 

After breakfast I went to my room and changed into my work out 
clothes which was only some shorts and a muscle shirt. I went out 
into the living room and that's when Gina stopped me and asked and 
where do you think your going I said to work out. Oh ok! she 
replies. 

SO I decided to do pushups first so I went back into my room and 
started I did about 80 and was poofed. I rolled over and got my 
resistant band to start my sit-ups when Gina walked in and said 
what are you doing now. I said I got to lose this beer belly. 

Gina looked stunned you drink beer? No I mean it's too big I said, 
she laughed. Then she asked something that I had no idea that 
would be the best experience of my life. You need a hand with 
that. I choked and said ok how are you going to help me? She came 
over to me and put one foot on each side of my hips. 

Ok now what are you going to do I asked looking crazy but to my 
surprise she did something that I thought she would never do and 
that was sit on my lap. I instantly felt her ass on my cock and I 
started to get a hard on. She said are you ready and I was like ok 
what are you going to do thinking to my self that she is going to 
feel my hard cock anytime now. 

She grabbed the resistant band and pulled it back at the same time 
moving her hips and moving her pussy over my cock. I was shocked 
what she was doing but she stop I was getting a work out she 
started to go at a fast paced and then I decided to go further and 
put my hands on her hips. 

I look up at her face and she started rolling her eyes. I was 
starting to move my hips with hers. We were literally dry fucking 
I knew that I was rubbing my cock with her pussy and it felt 
great. 

WE went at it for 10 minutes and boy was it great. She started to 
jerk her hips at the last minute and I felt a rush coming. I 
grabbed her ass and she stopped with her head looking up and then 
I came. 

She looked at me and said did you like my help. I look at her and 
said we need to start working out a little more. She got up with a 
wet patch on her pussy area and I went back to watching TV.