Not just relatives but your closest family will be affected if you are an irresponsible gambler. You might also influence one of them. But the most sad part here is that you're not having quality time bonding with your love ones because you spend more time on gambling.
Aside from influencing them, the burden that you're bringing to them that worries about you is going to be that much. Instead of them have nothing to worry with, a portion of their mind is thinking about you and how it is going to be with their relatives as well that you might influence. It's an equal and domino effect for the majority of them and you'll have to think about it because if you're an irresponsible gambler and you don't think the welfare of others but only yourself, there must be something wrong about you. It's okay to gamble on your own, spend your money and lose them all but when you see people around you are being influenced none other than you, you have to take precautions and have to adjust for their sake if ever you worry about them too.