I, too, have been having a hard time seeing that Brad "controlled" Nancy. It sounds that Brad started controlling Nancy's access to money (whether reasonably or unreasonable, I don't know...) and that was hard on Nancy. It also seems that Brad took the girl's passports. But we don't know under what circumstances or why.
Do you remember hearing Nancy's twin talk in a presser about the last time she spoke to Nancy? IIRC, she said something like--Nancy had been painting but would have preferred to be at the pool--Nancy was a bit of a princess--(I'll see if I can find a link...)
I've been trying to square this idea with what's in the affadavits and haven't yet formed a picture of Brad as "controlling" in the pathological sense. Although it may be that his controlling of access to money was the first step, and things were escalating rapidly. I don't know...
Yes, I do remember the Press Confrence where Nancy's sister said ---Nancy was a bit of a princess. I also think we can go back to the night of the party to an incidence that happened. Brad wasn't understanding what the 2 yr. old wanted and Nancy (scolded or corrected) him in front of all his friends, telling him he needed to learn to read the signals, because the child couldn't yet talk or express herself completly. I probably don't have this word for word, but the gist is there, the point I am trying to make is, this just isn't something a wife in a controlled relationship does in front of all her husbands friends.