Sentence:  The Roman Catholic natural-law tradition regards as self-evident that the primary objective purpose of the conjugal act is procreation and that the fostering of the mutual love of the spouses is the secondary and subjective <WSD>end</WSD> . 
Meaning of the word marked with <WSD> tags:  the state of affairs that a plan is intended to achieve and that (when achieved) terminates behavior intended to achieve it