Damn mutatio, you are making wayyyy to much sense. I had thought this over and over and over. Everything is for my kids. As I said, if it weren't for them her stuff would have been plastered everywhere.
She has no conscience nor any sorrow for her actions. I would like to believe that her past issues created this monster, but that would be a whole different kettle of fish. She comes from a family of liars, and that's putting it so very nicely. Quite honestly, I'm not sure what to make of her. I'm catching her in more and more lies, too. Maybe she really is as imbalanced as her actions suggest, but if that's the case, then she needs to be removed from their lives at the worst or have some sort of supervision.
But, if her crap is just an act - like her suicidal thoughts, etc - and she is doing it for attention or whatever, then she needs to be out of their lives. Those morals/values are totally unacceptable. I'm not sure, but there are indications that she is doing a lot of it for attention. She is a master at playing the victim.
She shows no remorse and doesn't accept responsibility for her actions in any form. Nothing short of a literal kick in the ass will make her wake, and even then I'm not sure. There have been occasions (albeit few and far between) where I have been brutally honest about the kids, to which she almost recoils and shows cracks in whatever is surrounding her. That is why I feel that she needs to really have her eyes opened. She sees what she wants too. But she is being led by someone, and I have a feeling it's her sister.
There are moments in this life when you are so confident in the rightness of your actions, that not even for a second do you consider the option that you might be wrong.