Translation of "fickleness" into Portuguese

To submit your days and nights to the fickle will of nature?

Entregar os nossos dias e noites aos caprichos da Natureza?

But she is instantly seduced, the epitome of female fickleness.

Mas é seduzida instantaneamente, o tipo da inconstância feminina.

You're right. You're as fickle - minded as a breeze!

Tão certa quanto a instabilidade de uma brisa!