I'm saying sex drives do change over the course of one's life naturally or due to certain factors. But it's not usually so quick.

When you have such a rapid change in libido, in women, it's usually due to a rather short list of possible causes.

Boredom/sexual dissatisfaction. Otherwise known as sexual frustration.

Fatigue

Shame settling on again.

Medical issues.

Lack of connection.

Further, a woman can have 5 orgasms every time she has sex and still be sexually unfulfilled if that connection isn't there. Sex isn't just about getting off. There's a physical aspect to it, yes, but for most people that physical pleasure is not enough to feel satisfied.

If it was, we'd all be masturbating a lot more. As it is, that's pretty much considered a band aid, a valve, or a crutch by most people. Why do you suppose that is, if it's pretty much a guarantee to getting off as much as you want?

Didn't think about that, did you?