For the love of money is the root of all evil: which while some coveted after, they have erred from the faith, and pierced themselves through with many sorrows.
-I Timothy 6:10, KJV
Not having money is stressful!
This is true individually as well as for marriages and families. It is difficult to deal with the necessities of life without sufficient money.
That said, character is revealed under stress. The stress does not make the person a different person but rather reveals the true person underneath!
A person with integrity does not break his or her vows of fidelity just because their partner isn’t bringing in “enough” money. Their character and fidelity is not for sale. They keep their promises–i.e. marriage vows–during the “lean” years and not just the “fat” ones.
An odd thing with cheaters is how they will complain about being poor to their spouses while wasting money on the affair partners and/or while squirreling away “wads” of cash without the trusting faithful spouse suspecting.
If money was the real issue, the cheater wouldn’t be able to blow a few hundred dollars on conducting an affair. Yet, somehow, that money concern magically disappears when the prospect of cheating presents itself to these reprobates!
A selfish person does not become less of such a person simply by having more money. Similarly, a generous person is no less of a generous person if he or she is poor. These are matters of character.
Money–or the lack thereof–might reveal the character quicker than when they have a bundle. However, the amount of wealth one has is not the determining factor of the underlying character. That exists independent of the money variable.
A cheater might blame-shift by pointing at “money concerns” in the marriage, but the reality is that he or she is simply being exposed as someone who lacks the necessary character to keep their own solemn vows of fidelity.
The lack of money did not make them cheat. Their lack of character did!