First of all a big congrats to him at least for once a good news from the casinos is recorded.
Secondly, it's also amazing he remember is family especially his mom that very thoughtful of him, but if you ask me I will say letting a big win to get cool first is the best in the sense that if it was me I would have keep it on the low without anybody  being aware of it first for security purpose, because people are pretty incredible, don't be surprised that out of happiness or over joy his mom wouldn't even know when she will out leak or procast the good news to maybe Neighbors or whomsoever you never can tell and you don't know that persons minds or intentions, senerio like this in my area has landed a guy to his untimely dead because he won a bet and everybody got to know about it, not everyone that celebrate with you are actually happy we you so one need to by more careful on how will celebrate or exposing our success to people so we wouldn't cut our life's short.