How to help my mom out of depression?

First of all, let me introduce the background: coordinate magic city, mom is 58 years old, retired at home, no hobbies, every day in addition to the online speculation stocks, is to do housework - grocery shopping, cooking, cleaning, washing clothes, evening bath, eat a good meal lying in bed to watch TV. Her health is not very good, there are gastritis, gallstones and several other chronic diseases, which usually have no symptoms. The most serious is cervical spondylosis and cerebrovascular disease, almost two or three days to a headache, earlier sleep on a good, and now has developed to the point that do not eat painkillers will not be good. When I went to the hospital, the doctor said that I could only have an operation on my brain to install a stent, but the risk is very high. If you don't need an operation, you need to pay attention to your emotions and reduce the number of attacks.  However, my mom is a depressed, agitated and angry master. To give a few examples: 1, my father loves to buy lottery tickets, there are always so many days a month will go to buy that kind of scratch music, a buy is several hundred, a month almost to spend a 7, 800, every time my father ran to the lottery center, my mother always want to send a burst of anger, think my father usually help us buy a few dollars for breakfast have to ask her to ask for, but for nothing to send so much money to the lottery center. (Here's a little bit about our family's economic situation, my mom and dad's retired paychecks add up to 8K, my dad was introduced to an easier job after retirement by an acquaintance and has 3K per month, and I have a monthly paycheck of 10K, which means that our family's monthly guaranteed income is more than 20,000 yuan, and all of the income is managed by my mom, and my dad and I get 1K per month for each of our pocket money) The result of the anger is that I have a headache, and then I blame my dad for causing her pain. The first thing I'd like to do is to get rid of all the stuff I've been doing, and then I'd like to get rid of the stuff I've been doing.