*blink*
*blink*
YOU NAUGHTY, NAUGHTY, BOY!
(Hey, here's a 50 yen coin laying around.)
HAPPO GOJUUEN SATSU!

btw you wrote:

"It usually takes a couple of hours."

and

"...I only fill about a liter at most every night, maybe two."

assuming that for this fic this is an accurate report
(I'm no medical proffesional but I suspect that in real 
life this is impossible) it would seem that a single woman
would be unable to keep up. Leaving the possibility of a
group sex lemon if the story was continued.

Of course, I would NEVER read a lemon story.
Honest.
Michael Gilson /8^{)