So my wife is really nervous about having lunch with her mother today. She is an Über-Dub who is always asking probing questions as to our spirituality.
I think she knows that we are fading out. She brings up all the classic horror stories of those who leave. She asks about our new hall. She always wants to talk about "the truth."
Sounds exactly like my mom. A few things I've learned help:
1. Fill the conversation. Rather than allow her to fill the conversation with probing questions, be proactive and fill the conversation yourself with lots of your own non-controversial questions about work, health, vacations, relatives, friends in her congregation you know. Basically keep her so busy answering all your questions about how Cousin Unemployed, or how old crazy Sister Fibromyalgia is doing, she can't ever find a firm foothold in the conversation to start picking away with those probing questions. DO NOT ask her about her Regional Convention, service, meeting, etc. (or anything WT related), since it will open the door for her to ask you the same question.
2. Redirect. If she does manage to sneak in a statement to steer the conversation in that direction, form your reply in a way that ends the topic and changes the subject. Example:
Mom: "I just loved that last symposium at the RC!"
You: (with feigned interest) "Oh, that's great to hear. So glad you enjoyed it! That reminds me, how is Sister Chronic Fatigue Syndrome holding up these days?"
3. Give closed end responses to questions and redirect (see #2 above). When asked any of the typical questions asked by parents trying to passive aggressively assess the spiritual health of their adult children (e.g., "what did you think of this week's WT study / yesterday's daily text / the JW broadcast from June?", "did you have any good return visits this week in service?, what did your congregation have for Local Needs this month?), give responses that directly and fully answer the question, but are vague. (e.g., "The WT study/text/broadcast was good as usual. By the way, that reminds me, how's Br. Chemical Sensitivity doing these days?"
If all else fails...
4. Stand your ground as an adult. If it's a question that's blatantly intrusive, call Mom on it. "Mom, I know you love me, but I'm a grown adult. I've never heard you let Grandma/Grandpa ask you those types of questions. They treat you like an independent, competent adult and I'm asking for the same courtesy. You've had your 18+ years to raise me. Trust me when I say you're a great mom and raised me well. Let's talk about something else; how are Brother and Sister Never Saved for Retirement?"