What does that mean "render due benevolence?" If you take it in context from the following Bible verses, I think it means to give sex to your husband a lot!
It is good for a man not to touch a woman. Nevertheless, to avoid fornication, let every man have his own wife, and let every woman have her own husband.
Let the husband render unto the wife due benevolence: and likewise also the wife unto the husband. The wife has not power of her own body, but the husband: and likewise also the husband has not power of his own body, but the wife.
Defraud ye not one the other, except it be with consent for a time, that ye may give yourselves to fasting and prayer; and come together again, that Satan tempt you not for your incontinency.
I Corinthians 7:1-5
Important verses; verses I think are ignored in today's culture. Marriage was designed by God to have a man and a woman become one flesh. Once they get married, they no longer have control over their own bodies. I have known many women who defraud their husbands of their bodies. They give them sex once a week or less.
Mark Driscoll taught in his Peasant Princess series that most men would like to have sex every day. That is a lot for a woman, especially if she is pregnant, nursing, and raising children. I want to challenge you to think of pleasing your husband in this way differently. It only needs to take ten minutes and it makes your husband really happy!
We need to stop thinking of it as a chore and start thinking of it as making the most important person in your life happy. Waking up in the middle of the night to feed your baby is not that difficult, because you want to make your baby happy. Attitude is everything!
According to these verses, God seems to know how important a satisfying sexual relationship is in a marriage. If you deprive each other, it can lead to harm. If men aren't getting it from their wives, they may go elsewhere, even though they shouldn't. They have a physical need for sex that most women don't understand, but God understands and that is why He gave this instruction to us. We need to believe it and obey it!
So as an older woman to you younger women and not so young, keep your husbands happy in this area! Happy husbands make happy marriages! Go back to the simplicity that is in Christ {2 Corinthians 11:3}. That means to take Scripture at face value, believe it to be true, and obey it. Simple as that and then reap the rewards of doing things God's ways.