so aside from gambling responsibly, will you agree that we should disclose our gambling habits or is it not the business of our spouses? does gambling really have the capacity to break up a marriage or a family?
Depending on the situation but as partners, there should be no more secrets anymore. That's the reason why you're already tied up to your partner and you shouldn't hide any secrets longer. The reason for most divorce and break ups are not really affairs but about financial matters. And gambling is one of the reason why someone in the relationship is having a break down of his finances because of potential gambling addiction.
There should be no secrets between couples but there could be time for individual pursuits or hobbies and this could include gambling. This doesn't mean that you should keep it a secret. At the very least, you should use your own money when gambling and do not touch the money for your family since it is for your own individual hobby.