No trouble disciplining my 11, 8, and 5 year old. But when the 11 year was two - I was introduced to 1-2-3 Magic. Now I moved more towards a chip earning reward system.

Have you ever watched that "Nanny Show". It gives people the tools - the story is pretty much the same the parent is at their breaking point of no longer knowing what to do. The "nanny" basically observes and then gives tools. Now I don't know in the long run if this show really helps anyone...

There could be many reasons...

1. Things are so out of hand - no idea how to recover
2. No tools
3. Lack of support from your son
4.Over/under disciplined as child
5.Possible that bpd drains the energy right out of her

You mention a degree, I'm sure you could probably come up with another 20 reasons other than bpd for the lack of discipline.