Hi jumper,
I'm very sorry to hear yet another tale of the cultish behavior of JW zealots, but that's all it is. Most of us behaved this way to a certain extent when we were still blinded by the cult. For instance, I was one of Jehovah's Witnesses for about 30 years, my choice, I was not raised in it; and I'm very fond of my sister, and she is of me; but as a zealous Reg. Pioneer sister, she shunned me COMPLETELY for 5 long years, not even discussing necessary family business when my minor children were visiting with her for a couple of weeks, clear across the country!!!
I consider her a very good, caring person, but the cult tactics and control of the JW's are very powerful.
I hope your family come to their senses. They are being taught a lot of destructive nonsense.
Best wishes to you though!