Carbon copy re-enactment of that dude that killed his family over the e-whore. Minus the e-whore. (More or less what you said) Sooner or later his gambling resources will get cutoff and he will either violently freakout and try to force his parents to give him the resources, or he will have to figure things out.
In the case of the severe addiction mindset, bullying people around them is very often percieved as the easier option than quitting to the addicts. So big things coming down the road when his parents need to use their money for self care instead of him.