Per the "Do women cum easily after a long drought" question:
it depends. At first, a woman will get ridiculously horny, and will cum very very easily. After a certain amount of time (10 days - 3 months, depending on the woman), her body and sex drive will reset to how it was before she ever did anything. In essence, she will be a virgin again. At that point and afterwards, it will take as long as it did her first time ever.
In my case, how long it takes is anywhere from 10 days to 3 weeks, though I haven't figured out what the exact factors are and how they work.
Keep denying it Aella! You will hit a wall, and it will get easier after that wall is breached. Yes, it will get harder before it gets easier, but IT WILL GET EASIER. Eventually.