Monogamy

I mean "settling" in the particular instance in a relationship where someone is not sexually attracted to the other person and "settles" for them anyway for whatever reason.

For men or women, sure, you can be immensely sexually attracted to someone or not as much but I think there is a pretty distinct feeling of either you are sexually attracted to someone or you are not.

If there was pretty much no sexual attraction in the "honeymoon phase" then one can easily imagine how terrible it gets after one year, five years...

This kind of settling where there is no sexual attraction from the early phase onwards is what I mean by settling.

So to come back to the love then comes the lust part for women - If love is here meant as in eros love and is thus "immediately" coupled with lust then I can see that but if love is meant as in agape then I don't think there will be much eros or lust down the road.

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Most men and women.

Lust - pathos - dissipates.
If there is no underlying love the relationships ends. If there is the relationship changes into something else....a different settling, due to habituation, old age etc.
Erotic pathos does not endure time.
Like all energy it changes.

If there was no lust at the beginning then I can't imagine there being much respect either.
Lust may dissipate but if there was none at the start then I doubt there will have developed much love, whatever kind of love at that, none at all.

Yes, and for women lust builds.
So, women need to be pursued or seduced.

Lust goes through their mind. It must be cultivated.
With males it is spontaneous, physical, and then it may be enhanced or diminished.