The context of the following conversation is Austin observed the abuse everyday, and eventually stood up to their drunken father.:
Austin says Dad was on another drunken bender last night..
The friend responds OMG I'm so sorry to hear that.  What happened?.
Austin responds He cursed and screamed at Mom as usual, but this time he actually slapped her..
The friend responds Oh my goodness!  Bless your Mom.  Is this the first time he's actually put his hands on her?.
Austin responds First and last!  I took him down with one punch and screamed that he better never lay another finger on her or he'd have to deal with me!.
The friend responds Good for you standing up to him and for your Mom!  You're a brave and good son..