I'm not sure of the relatives, but it affects the close ones for real. I personally experienced it. Being into gambling I've suffered much and now I've come out partially. At times the loss can't be accepted and our minds won't work as we think. This affects the family and the close ones. They can see the difference and the same makes them down. Atleast to keep our surroundings happy we should have healthy gambling habit with limits.
Im agree with this kind of mind set and experience because most of my friend i give them advice not to gamble that much , most of the reason here is they already had family and doesn't have a decent job that can sustain most of their daily living number 1 that can really affect. two is when they are in so much debt they realize the trauma , anxiety , depression on how they can pay those debt until they will take a loan from family members which if you cannot pay the result much be worse. Thats why im advicing them not to gamble that much know their limits and gamble is just for fun and sportmanship where when you lose accept when your in win win situation stop and withdraw next month again.