My brother and his girlfriend are neglecting their infant. Should I involve CPS and a lawyer to get emergency custody?

Long story short. My mother is 65, they currently live in my old bedroom in her house. With the baby (3 Month). After they got thrown out by their old landlord. Both are unemployed and all he is doing is his phone and his car. They drive around and play good life, while my mother is taking care of the small one. My dad had a stroke a few years ago and they are draining their retirement funds to buy diapers and formula, feeding them and clothing the baby. My brother is cruising around fiering his entire welfare in a few days and then ask us for money. We have spent a small fortune to get them situated with clothes and baby stuff. I've been thinking about helping my mom and take the small one. I have more then enough room, money and time to raise a second one after the first one (now 7) turned out so well. I'm infertile and my husband and I wished for a second baby for a while now. They are both in denial and both refuse to communicate or listen to our concerns. I'm at the point to hire a lawyer and involve CPS. I've tried to be nice. I'm not having it anymore with them.My mother calls me daily and every time they are away. And the Baby is with Mom and Dad. They are somewhere else or something like that. She is at edge, but tries to keep her composure, because she is afraid that they take the Baby and leave. Im done. I want my money and time back. And all I can do is offering this Baby a better chance to grow up loved and happy. I don't know what to do anymore. Am I going too far? Should I mind my own business and just leave it be? I don't know. via /r/Parenting https://ift.tt/2Cyb2q6