Not to familiar with gambling but have done well with the roulette and quarter slots in the past. It has to be a bit different from substance addiction which is more internal 'fix' where gambling for short immediate gains can be directly result to her current economics or lack there of. If she kept all of her earnings would she still be in debt and unable to provide? Not struggling, we all struggle. People want a quick fix, just one big score and sometimes ease the mind as it's "easier" to justify. Financially it would seem you need much more money-collateral to feed a gambling addiction than to cycle through drugs or alcohol. It's also much more socially expectable and readily available in the age of point and click.