I might sound selfish but lord jesus!

So my mother klecame disabled a little over a year ago. She was denied government assistance so myself and my brother have been k care of all her expenses. She was the best mother she could be although we struggled alot after my father left. So when she first became disabled she went from full time to part time then not to long after she had to leave her job completely. her boss wasn't happy about it because she got extremely sick over the course of just a few months and it wasn't enough time for her to find a replacement so being spiteful she took her time to give my mother the letter saying she was no long working. So she got backed up in rent it came to be little over $3000 so the landlord moved to evict her. My brother put $500 and my husband and I put the rest from our savings. We literally stayed broke to save her apartment. It's been really hard to get back on our feets being that I was pregnant at the time. So things got just a bit more expensive after adding another mouth to a family of 4. I decided along with hubby that we would struggle just a little long so I could get my mother a lawyer to assist her in getting her SSDI. Now shes been approved and instead of saving the large amount they're going to give her and start paying her own phone bill, rent, light, and life insurance she wants to treat herself to a trip to Dominican Republic. I dont mean to sound like a brat but theres more important things she needs to take care off. Hubby feels like it's not my business what she decides to do and we helped cause we could and wanted to and I'm not asking for the money back but I feel like she need to now be responsible for herself.