A richer hubby presumably increases survival chances for the offspring (independent of the actual biological father of said offspring). But the fact remains that a woman can easily get laid any time, if she wants to.

There was this famous experiment where students approached other students on university campus and asked them if they would like to have sex. Don't recall the numbers, but there was a real high discrepancy between the sexes, basically most men who were approached by women said yes, whereas hardly any women said yes. So basically as a chick, just walk up to some men and ask.

Of course modern society complicates it a bit because men now have the risk of paternity charges (a societal construct).