Just found out my younger brother whos 21 is having a baby with his girl friend who is HIV positive.......

Long story short I dont even really know my family any more because there all either drug addicts or alcholics so once I married my husband we pretty much went our own way which was the best thing. I talk to my mom about once or twice a month just to make sure my siblings are all still alive and today she dropped the bomb on me that my brother is having a baby! My mom is embarresed of my other siblings so she kept this from me for a while cause his girlfriend is already 4 months along. She didnt want to talk about it anymore so we got off the phone and I just sat there and cried because my brother is addicted to pain pills and drinks allot like my mom and last I heard of his gf she had been in rehab. My mom said they have no money and my brother has been crying cause hes worried about the baby getting aids so shes tyrying to get them on gov assistants. I know who his gf is and she is very sweet but not so much smart cause I remember 2 yrs ago she was trying to get pregnant without my brother knowing and they both were really bad on drugs/alchol then. So my brother is living with my dad right now and going to move in with my mom in the next couple of days with his gf so I dont even know how to take all this in. I want to congradulate him but Its very hard for me to act as if everything is going to be ok. Its a cycle in my family, my moms mom gave her away to a girls home and she is an alcholic too and then my oldest sister just gave her kids away to there dad cause shes a drug addict and that was more important to her then her own childen so I dont see good things coming from this. I wish them the best and want to tell him that but i just dont see it happening. Thanks for letting me vent