Depending on the situation, if the gambling activity doesn't interfere with their relationship I think it's not a problem. But if they both gamble and the situation is that they are in trouble and often fight because of this, both of them must stop gambling and find a solution to their problems. Because there have been many incidents where families have fallen apart because either one or both partners became a gambling addict and it destroyed their finances.
On those conditions, it's not advised for any side of the party to continue gambling. There are always two sides to every story. While others may think that it's wrong, another family may grow happier through gambling together. However, if they're just newbie gamblers who are not experienced in gambling, then it isn't worth the argument, that they should stop gambling. I'm always on the side of experienced gamblers, who as a family enjoy the fun of gambling. And have all the required strategies needed to be responsible in gambling. The risk is always high if one side gets addicted, and the other spouse doesn't notice it. The finances of the family will be detrimental. Thereby affecting the success of the family. But, if a responsible gambler figures out that his wife also gambles, he shouldn't fidget or push his wife to jump out of her gambling addiction.
It'll only affect her and could lead her to gambling secretly, and expose her to problem gambling. Which won't be a careful move by or from the husband.
The right thing to do is to watch her play and also limit how much she should spend on gambling. The experienced gambler also has to control his wife not to get addicted. Saving the family from a financial problem. Telling one party to stop, will cause lots of trouble. Like, who would stop? gambling isn't bad. Excessive of it is. However, there's a misconception about the notion of gambling and people need to change how to perceive gambling. I'm surprised not to have seen a comment that says gambling can help in uniting the family. When two spouses are in a similar niche, they'll have a better rapport of themselves. Therefore, gluing them together, and making them love each other the more.