Where would I go?
This is a reference to the way the WTS misquotes John 6:68, making it seem that it is talking about what organization can you go away to? But that is not what this Scripture is talking about. It says "to WHOM shall we go away to", and it follows with the answer. "YOU" (Jesus).
The context of this passage is clear if you start at verse 25. All the way through, Jesus is telling how we are suppose to come directly to Him. That is how the Father arranged it. You have to deal with Jesus first. Directly. (see vs. 35, 37, 39,40,44,45,etc...) In vs. 53, Jesus is telling them that you have to eat His flesh and drink His blood, which some of the people found very offensive. Resulting in some of them falling away, because they couldn't bring themselves to do such a thing. As you can see, this Passage has nothing to do with an organization or religion. It has everything to do with coming to Christ.
Most JWs that I know do not realize this, because it was taught differently. It was taught to be an organizational verse, pointing to the WTS, rather than about Christ.
That is just an observation. It may be very freeing to your Mother if you study the Bible with her, without any other publications, just read IT. Especially Galatians 4 and Romans 8. Those seem to be real eye openers from what I understand. I pray the best for you and your loved ones!