How would we know what she believes? It could very well be that she just succumbed to peer pressure. It could be that she's PIMO though if she's inactive I don't know how PI she is. Then again, you can't tell how mentally in she may be either. Lots of things happen that would surprise people and people are still hard core believers. There are too many variables.
So you're still marrying this guy? You said she's your future mother in law but I thought you started threads about the guy and I thought you intimated that you were going to maybe go another way.
It sounds like you're still really hanging around all of this stuff. Watch out, you may not be as out as you think. Sounds like you're maybe still going down a very JW path and about to get married into it even more unless I missed some changes with this guy you're engaged to. You see, this stuff is insidious, and you don't know where anyone really stands when they haven't taken one yet. It's a tricky situation. It's easy to find yourself in deep by continuing to go down these paths.