Yes the one who would be most affected are those who depends on the gambler, if they already have kids the kids would be the one who would feel the consequences of the addicted gambler because of thet would struggle financially.
I agree that parents would surely be affected but not as much as the gamblers kids, sometimes they would even be made fun because of it in short they could also be bullied due to their parents gambling addiction.
Admittedly, the immediate family of the addicted gambler which includes the wife and children, would bear most of the brunt of his addiction. They’re going to slowly feel the drastic change/decline in their standard of living as the addicted gambler who provides for the family continues to lose more and more money due to gambling.
The immediate family may also be the subject of ridicule as the addicted gambler, being recognized and known by society as an addict would be subject to ridicule and side talks by the town folks.
The indirect victims of an addict would be lengthy as it does affect almost everyone you come in contact with.