And now we're back where we began. With mom and the rest of the family being very upset...and we're wondering what will happen now.
I want to give you a little hope. As you know, I'm a five year veteran "Unbelieving Mate". JW's go through cycles of dedication. Your dad has been quietly allowing you to be at his side, enjoying your company. That is his natural personality, and I am sure he enjoyed it as much as you. The "cult personality" will come to the fore right now, but my guess is he will resume visiting quietly with you again in the near future, and deep inside he's as enraged with the elder's interference as you are.
Encourage your mom to keep on doing what she is doing, and the organization's hold will gradually fade. Or snap. Depending on how mad your dad is inside over the interference.