It's also worth a thought - as much as most hate her - to realize she's going to do some time. Less, yes - but with that, she's giving up information that will destroy her family. Her long-term affairs, daily calls, and pregnancies, abortion/s. It isn't easy to sympathize with her but there is no doubt this is easy for her, either.
It would have made sense to show how easily manipulated she was - that seems pretty clear to me. She was PF's tool, his slave. She would do anything for him.
While it makes us despise her, we should try to understand that type, as well.
No, I'm not feeling sorry for her at all - but do feel it's worth understanding her type of personality.
In a very secondary way - IN NO WAY A COMPARISON to KB - she was also a victim.
(I know, I'll be hated for this post - I'm ducking under the desktop to avoid the rotten tomatoes right now!
)