Bobbi
They have been taught that shunning is the way to "shock you to your senses" and make you come crawling back so you can have their affection again. It has been an effective strategy within the WTS for decades, so it's not likely to change any time soon. What we do have now, that we didn't have 15 or 20 years ago, was the ready access to a support network like JWD to help us through these difficult times and remind us that we are doing the right thing for ourselves and our families... and maybe just maybe provide a surrogate "family" when our own flesh and blood decides to show their loyalty to the WTS.
Now that they have thrown down the gauntlet, though, it is extremely important that you stand your ground and let these JWs know that shunning you and Para - disrespecting you and Para - is not going to get them access to your children / their grandchildren. People who disrespect you and shun you should NEVER EVER get the opportunity to do so in the presence of your children. You need to protect your children from people who disrespect you and shun you, because the message your children will get is that it is OK to disrespect their parents, because Grandma and Grandpa get away with it.
It's really hard sometimes not having extended family to interact with. I do miss my family, but my kids understand that the choice to shun was not mine. They understand that our family is loyal and respectful to one another, and we will look after each other, and we will not allow anyone to treat anyone in our family with that kind of disrespect. We are a package deal: shun me or shun Mr Scully, and you can forget about ever having contact with our children. They chose loyalty to a bunch of money grubbing old men in Brooklyn, and one day they will learn that their loyalty means NOTHING to the WTS - when they are old and decrepit and in need of placement in a nursing home or nursing care in their own home, or financial assistance because their Old Age Pension won't even cover their necessities of life, they can find out just how loyal the WTS will be to them.