Is AUTHOR wrong in the post ? POST : I'll add some background information so that you may know where I'm coming from. 

My mum (38) separated from my dad (49) 2 years ago. The thing is that he married her when she was really young (18), so she never got the chance to travel alone. 
I'm not mad at her for travelling alone, I encouraged her to do it. The problem is that she spent an extraordinarily amount of money in that vacation. She stayed in a hotel that charged her $257 dollars per night. She stayed there 10 days. That's not counting what she spent in the plane tickets, food, transportation,etc. So in total, she spent what she earns in a whole month in that vacation.

 I know that what she does with her money is not my business but, she literally doesn't have any money saved. She doesn't even have health insurance. She doesn't have a good credit score because she was a house wife for a good chunk of her youth. I think that it's an incredible stupid decision on her part to spend all her money like that. 

I tried to be gentle while telling her that I don't like with the way she spent her money, but she told me that I had nothing to worry about. That she had everything under control and that she needed to find herself, so that's why she had to travel alone. And that this won't be her last alone vacation. That she plans to do it at least once a year. 

I know that she doesn't have everything under control. But I don't know what to do. It's not my place to control her, and I sure as hell don't want to. But I want her to be able to peacefully retire. I want her to be able to pay for my sister's (5) education. I want her to be able to have her own house and her own car. But she doesn't know how to save money, and that makes me angry and sad.

I'm sorry that this is too long, and I understand that I may be an asshole for being mad at her for enjoying what she couldn't have when she was really younger. 

