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Just because the husband is the spiritual leader of the home doesn't necessarily mean he should lead in every aspect of the marriage. If the wife is a better financial manager, give her the freedom to use her strengths for the good of your family! After all, God gave the husband a wife to be his helpmate.
You're new to the 5 Love Languages. What's your next step in learning them and applying them? First of all, discover your own, then discover your spouses love language. You can do that by reading Dr. Gary Chapman's book, The Five Love Languages.