In her family, money was related to security and self-esteem. Every potential purchase had to be thoroughly researched. Resources, including Consumer Reports, had to be consulted. After much deliberation, a decision was made, and if the money was spent, the purchaser then felt guilty about it. If you and your partner have different money styles, don't be alarmed.
Most folks do.
There are many things that can be done to help blend the differing styles. Here is a list of do's and don'ts that not only helped Bob and Mary avoid checkbook battles, it strengthened their relationship as well. Don't assume that your way is the only right way. Don't accuse your partner of being wrong or sinful. Don't try to force your partner to see the issue your way.