<human>: Can you condense the text into three sentences or less?

My mother is 56 years old and has what I would like to call an addictive personality.  She has had or does have issues with other addictions in her life.  The most worrisome of these at the moment is her gambling addiction.  

Someone introduced her to an app on Facebook where you could play slot machines.  At first, I thought this was fantastic because she was not losing money and satisfying her addiction.  

Last year I found an email on her computer to the company that created this app.  She said she accidentally pressed the max bet button and lost all the credits she had spent a ton of her money on.  She also said this was her only release in life or something like that.  Disgusted and confused I went to her Facebook to see payment history. 

She had spent over $16,000 on this slot machine game, where I am pretty sure you have no chance of winning any real money.  I was livid and confused.  I was privy to her closing her retirement account with about $20k in it and I then knew where all the money had gone.  At that time I chose not to tell anyone but kept an eye on the payments anytime I would come home.  

The payments stopped for a while so I thought the problem had gone away without any pursuit; I was happy. 

Then I was home for Thanksgiving and checked and she has spent $200 on credits this month.  

I want her to stop but how do I help her when it is her own money?  I also feel sleazy for finding out the way I did.
<bot>: Mom has an addiction to gambling on a Facebook slot game.  Has spent over $16k.  I found out by snooping.  What do I do?