yeah i also gamble with my mother and with my relatives too but just at home. I never experienced gambling with them in a casino and i dont think its appropriate to gamble with my parents in such place. Although i did gamble in a casino with my cousins and siblings already.
Nice family bond, I have experienced to gamble with my relatives but AFAIR I haven't gamble together with my parents, both of them.
With that kind of gambling, it's not really serious because it's just a way for you to enjoy everyone's company.