Exactly sharing your wins is base on ones choice , is not a much . Sometimes one can win certain amount of money and he or she would be overwhelmed with joy , and with that they can just easily share out some portions of those wins . Especially when the win is pretty huge .
There are some winnings that come with the joy of sharing; there are also some that come with the player just keeping everything to themselves because of how much they might have lost before that winning finally comes through for them, and that moment, even if you are aware that they just won a game, you might not get tips from them. There are some who will just willingly, with the joy of winning, share almost everything with others. It happens; it all is based on the mood the player is in and not entitlement like some close friends feel to the winning.
If they don't tell their gambling winnings, no one will ask for that money or they don't have to share their winnings to other people. They can enjoy their winning money alone and keep the rest of the win money for their future. So that will depends on themselves how they will use that win money but usually, when we win much money, our attitude will be different than the usual so that can makes other people curious. We can keep the secret of our winning from other people so we only need to tells that there is nothing happen to us.