If sex is withheld it is because the husband does not love the wife and treats her like a doll.
If sex is withheld it is because of sin. 1 Corinthians 7:5 Do not deprive one another except with consent for a time, that you may give yourselves to fasting and prayer; and come together again so that Satan does not tempt you because of your lack of self-control. Your excuse for a wife withholding is prima facie to the success of the feminist assault and destruction of marriage.
I don't recall ever seeing you post a comment where anything is unequivocally the wife's fault.
If the wife is withholding sex, it's because she is no longer attracted to her husband. Whether it's because she's found somebody else, or because she's unhappy with his behavior, the root is she no longer admires him.