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Married Woman's Camp is a Feast of Lust - Reunion with Childhood Friend and 3 Person H

A dull businessman is camping with his two best friends from high school, now married women.
He is bewildered by the two women, who are not the same as they used to be, but are now plump and sexy, and the camp is filled with excitement, as if the days when they laughed together were only yesterday.
The drinking goes on, and the man falls asleep, but then, by chance, he gets under the skin with the wives...!
Camping with a former classmate who is now a married woman...Harem sex in the great outdoors!?
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This is the censored version.

I also posted the less censored version here: /g/2774143/4126aa03db/