I can see how she is a little offended if you have a problem that she used to go out and get drunk, sheesh!

I'm 35 and I still have a drink (since I'm not dead), in fact I'm going out this weekend and I dare say I will get a little drunk. Thats not irresponsible. I've also crowd surfed, swum topless at the beach, rode backwards on a motorbike and stole a packet of bubblegum when I was 12.

None of this makes me incapable of being an excellent parent, or take care of my best friends daughter should anything happen to her. You poor friend is a bit hurt because now there is a actual baby, she isn't good enough (or responsible enough). Don't hack on her because she is hurt, try to be a little more understanding?