I think the opportunity that presented itself where she tried to explain what was going on in her head needs to happen again. Just sit and listen. Even suffering from BP it's very hard to explain to others.
I just pray that she doesn't bump her head once too often before she realises that BP cannot be tackled alone (Has she officially been diagnosed?) but needs the assistance of Medication and psychotherapy. The book "An Unquiet Mind" really explains BP, and especially the mania part, very well. I've nearly completed it and it opened my eyes. Especially as I suffer more from the depression than the Mania.

I think your assistance, be it enabling or helping, is invaluable.