How would you help someone with a dangerous spending habit?

My younger friend came to me for help. His mother is a very kind mom but she likes to give too much. To the point where it affects the family financially. He tells me when he even mentions the problem she gets extremely angry and always tries to dance away from the problem. She usually replies with “You are always so negative! You are the same as your father!” His father by the way is working 24 hours a day trying to pay the bills while his mom is spending, spending, spending and I think it is because of the stress she is under. He came to me for help and I don’t know what to do. What should I say to him?