Means

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The first wife with such a nose works hard for her husband for free.... while

The husband is usually addicted to gambling, drinking (alcoholic), and visiting prostitutes, and the marriage usually ends in divorce.

 

A woman with that nose will enjoy more happiness in a happy marriage if she marries a widower (second wife).

Since there are not many widowed men in the modern world...so

A woman with the nose of a second wife is in her place to marry divorced husbands (a second wife) to enjoy a happy married life. A man with that nose (the nose of a second wife) works hard without good results (without rewarding compensation) and is therefore generally unsuccessful.