I took money from my dying grandmother
That's so cruel. How could you take money from your dying grandmother?
I need this money to gamble
You needed money for your gambling addiction which is quite clear to me. First of all, get some help for the gambling. Please just get your own money for gambling so it would make you quit cold turkey.
I am going to test fate and see how much I can steal from my grand mother.
I think it's best to just stop these actions from now on, because gambling addiction is a huge monster. Don't you think your grandmother deserves better? How about being honest with her, and maybe she'll try to help you out as her last parting gift with you?