About 15 years ago my then-wife and I had started going to a local swingers club.
We met a hot couple who filmed an adult series for Metro using local couples.
They asked us if we were interested.
My wife, who was very sexy and promiscuous, was thrilled.

One weekend not long after, we filmed at their house in a nice suburb.
It all went smoothly and we performed well and were excited doing it until it came time for me to cum.
I had been fucking for quite awhile and was just too wound up.
I just couldn't get there.

The director, who was also the cameraman, stopped for a minute.
The series of movies he was doing featured something new, a change from the pop-shot on the face which was common back then. I never liked that as it seemed degrading.
His films now were all-internal cum, with a close-up at the end of each scene with the woman's wet pussy leaking cum.

After a short rest, my wife decided she had a solution.
She told the director/cameraman (who BTW was the husband of the couple we had met at the club) to fuck her and shoot a load in her. She said that that would make her even more turned on and make me cum.

He did and it was hot to watch.
As soon as he pulled out, I put my cock in her again and he got his camera and the filming began again.
Her pussy was so awesome I lasted maybe 8-10 more minutes.
The last shot is of my cock pulling out of her.
A long string of cum follows, running down her leg as she lays back and fingers herself.
The load of cum is extra large and makes the scene really hot, just as she thought.

Only those we told who have seen that scene know that it was 2 loads of cum in her.
The shot of her was instantly popular.
15 years later, it is still easy to find on the internet.

This IS a true story.
But I just don't know if I should actually post what movie/scene we were in.
I suppose I will in a comment if someone doesn't believe this story is true.