Wow DB, thanks for sharing that story. I loved how you highlighted the fact that you have not turned against God and asked her to show you the biblical principle for apostasy. Also, the fact that asking questions should not deem you an apostate is so true. Disagreeing with certain actions on the part of a multi-billion dollar corporation and asking them to be accountable for their actions, is NOT apostasy.
I wish my mother would even entertain the notion that it is ok to ask questions, discuss, debate, religion. You are fortunate that she listened enough to allow a crack to open in her "the WTBS says so, so it is so" armour. Also, sounds like you made good ground in gently helping her to see that they are not tantamount to God himself, in fact, just another manmade religion. You did this by letting her come to her own conclusions. Very respectful DB.
Hugs from Jez