Are you advocating he doesn't address this or that he tones it down and gets ahold of himself first? To me, there is a big difference between the "I'm going to act like a child and pretend bills don't need to get paid" and opening up two credit cards in his name. If she opened up more in her name and didn't pay them, that would still be irresponsible, but this is different.
My two cents is that you take all the precautions recommended above, and add one by calling the three credit bureaus and requesting you receive a fraud detection call anytime someone tries to open up new credit in your name (a good practice all the time, even when not dealing with an MLCer). Once you do those things, she is going to find out you know anyway, so why not calmly talk to her and let her know this is not acceptable to you? Unless you won't be able to talk calmly I guess, but I am struggling with this being a GAL 180 situation?
Sorry if I confused the advice JFun, these guys are really good, I am just struggling with this one.
CB
Me; 42, W; 43 M; 16 yrs S12, D9
3/13 - "I want to move to XYZ City (four hours away) and it might be without you, not sure" 5/13 - "Not sure I meant that"