The next time she calls you at work make the conversation go this way:
"Hi, it's your mother."
"Hi, mom. The boys are fine. Timmy got a job with better pay. Bobby got a new girlfriend and is trying to get a new car because he got promoted. I know that's the only reason you called and, as you clearly state every time you do call, I am at work and you don't wanna keep me. So if there's nothing else I'll talk to you later."
I do this with my dad. Non of my folks are JWs though. Me and my dad have never been close. I really dont have too many feelings for him and he's never been there for me. Hell he never even came to my graduation and I doubt he'd come to my wedding (if he doesn't that will be the last time I ever speak to him though). He called me once last January and the next time he called was this past November. And this is the way he started the conversation, "Hi there. You know how I only call when I have a problem with my computer..."
I said, "Yeah, I'm painfully aware of that Dad. What's your problem now?"
Then he went on telling me that his piece of shit is acting up. I just said, "What the hell am I supposed to do? I offered to build you a much better much cheaper computer. You chose to buy a $2500 Hewlet Packard. Since you would rather do business with them then take your problems to them too." He went on a little more with his pc probs but I told him that I'm not their tech support. They have proprietary stuff in there and its not the same as when I build them. I DONT KNOW! CALL THEM!
So he said he would. Then he started going on about how he is soooooo busy lately. This man is retired and doesnt work! I said, "Dad, you're retired. What the hell are you SOOOO busy doing that you can't call me for 11 months?"
"Well... I've been playing alot of golf lately. I've been playing it so much I can't even get stuff done in the house. I went for a month without mowing the lawn. I just can't get to it!"
I said, "Sounds like your priorities are all screwed up then. You need to figure out what you view as being more important to you. But you mean to tell me that the reason you haven't called me is because you've been so busy. And the reason you've been so busy is because of GOLF!? I guess I see where your priorities are. That;s like me saying I can't talk to you because I'm busy playing video games dad. You need to spend some time figuring out what your priorites are and figure out how to schedual them a little better. But for now, I gotta go."
That was the last I talked to him. I called at Christmas but I got his machine, left a message saying Merry XMAS and to call me when he got back and he didn't. So screw him. Don't waste your time with people that don't wanna waste their time with you. Who cares if it's family? They are people bound by the laws of human decency and common courtesy and if they can't treat you decently then don't waste time with em.