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So, our family had planned a trip . And we had only one car . 4 years ago , I used to sit on my sister’s lap as our car was small .
But now, I got bigger than my sister .. so she had to sit on my lap . To give you an idea , my sister’s tits are massive .. And is ass is well rounded to make anyone cum.
Our car ride was good for the first half hour , but then we got to a very uneven road surface .
My dad drove through the ditches and my sis bounced on my lap as the road got uneven .
I got a bonner .I was wearing thin shorts , and my sister’s soft ass was bouncing on my cock . I tried to hold back . But I couldn’t , I came in my shorts as I held my sister’s waist .
There was a wet stain on my shorts ..
To cover that , I took my water bottle and drank some water and spilled it on my shorts
NSFW: yes
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Does your sister know about this?