Welcome, wezz.
So sorry that you are now in this difficult situation.
Yes, she originally came to you when you were not a JW. This was disobedience on her part. She looked outside the organization, despite all the clear stated mandates from the "faithful and discreet slave." She was considered "touching something unclean," etc. Her actions spoke for her in saying that she was willing to go against the holy spirit directed words of the WTS and words from the Bible itself in "not mixing in company" with an unbeliever. She was Dinah "going out into the land." How does she now "get on a high horse" because you are say words contrary to the WTS? Hypocritical, isn't it?
It would be interesting if you asked her all these questions. I'd sure like to know what her response is.
Also, let her know that you'll not be a "spiritual danger" to her; she can go to the KHall if she chooses. That way she has no WT grounds for divorce. Also, please speak kindly and patiently-in response to her-don't go in defensively- as you visit her and your child. Also, don't go empty-handed. Go with money and gifts for her, your daughter, and your unborn son.
Hoping the best for you.