The wife does not have power over her own body. Her husband has the power over her body. And the husband does not have power over his own body. His wife has the power over his body.
Don't refuse to give your bodies to each other. But you might both agree to stay away {from sex} for a time. You might do this so that you can give your time to prayer. Then come together again. This is so that Satan (the Devil) cannot tempt you in your weakness.