Obviously, they know the risk behind gambling but greed will not let them be, they will make decisions that will hurt them and when it doesn't favour them, they manipulate people around them, greed people are insatiable with this habit. When they have money, they spend recklessly the way they want and when they notice that the money is going zero, they risk it to bet thinking the money can be double and if this don't happen, they cry victim. Almost everybody on earth knows what gambling is about and she knows exactly what she was going into, she is not a baby.
The subject says it's a she and you are consoling her as a he.
![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif)
Don't act like you don't know that they know what gambling is/was about, even if she don't know. She could have just try it with a few dollars and see the outcome and if it's not favorable thing to play, she could have stop but from OP explanations, she lost a bet and was looking for sympathy with cry, is that how life works. Next time, she will learn better, life itself is not fair.