So, after reading all of the previous passages you might be asking “Why should a man’s wife not be one of his accountability partners?”
There really are two reasons.
The first reason is that it undermines his authority by making him spiritually accountable to his subordinate. The reason a husband should not have his wife as an accountability partner is same reason a Pastor should not have one his members be his accountability partner. Accountability partners should ALWAYS be equals, and never subordinates.
The second reason a husband should not have his wife as an accountability partner is because of the simple fact that she is a woman. Men and women are different. We have very different spiritual struggles and very different natures. A man cannot fully comprehend or understand the spiritual struggles of a woman nor can a woman fully comprehend the spiritual struggles of a man.
That is why the Scriptures even encourage gender segregated spiritual mentoring:
“But speak thou the things which become sound doctrine:
That the aged men be sober, grave, temperate, sound in faith, in charity, in patience.
The aged women likewise, that they be in behaviour as becometh holiness, not false accusers, not given to much wine, teachers of good things; That they may teach the young women to be sober, to love their husbands, to love their children, To be discreet, chaste, keepers at home, good, obedient to their own husbands, that the word of God be not blasphemed.
Young men likewise exhort to be sober minded.” Titus 2:1-6
So, again Accountability partners are great. But wives should not be accountability partners for their husbands because they are their husband’s subordinate and because they are women and cannot fully relate to the spiritual struggles of a man.