What more if both couple are addicted in gambling. Gambling is really not good for a family because it can ruin your family easily specially when the both of our parents always go to gamble. If you really love your family, you will choose good relationships than to gamble. We have a lot of resources to make money, so better to do it on a right way.
It is very easy to get carries away in gambling because one will never know how quickly the money will move out from them and thus they will be back to zero. And if one becomes addicted to it they would like to spend more time on gambling effecting their relationship between their families.
Sure, most gamblers are unable to manage their normal lives with the gambling career because they are addicted and keep loosing money to the bookies instead of supporting the families with them. This goes in the long run to affect their relationships with friends and family at large.