Of course the decision is all up to you, but going back to meetings, even to a few of them, may backfire in your overall strategy, if you have one.
The problem is that doing that sends the wrong signal. She may conclude that she is winning you over; that her ideology is stronger than yours. Also she may conclude that she just needs to keep doing exactly what she's doing, which, of course, goes against your interests in the long run.
I have read a bit about your case, and I think that the best thing for you to do is to formulate a strategy and stick with it. Taking a non-confrontational approach has worked for many people. The more she realizes how opposed you are to the "troof", the more determined she will be. The non-confrontational strategy involves showing her that you want nothing to do with the JW religion, but won't block her to do as she pleases. You may even want to drive her to the KH, assemblies, field service, etc.
As she sees your changed attitude to her religion, women eases up a bit and began to share her true feelings with you. Then, slowly, without showing too much effort, you have to start introducing some doubts and questions in her mind, but keep subtly reminding her that the decision is on her. She needs to realize that SHE needs to do some of the work for her release. In other words, she needs to understand that her putting some effort to reevaluate her faith is something she needs to do for her, not for you.
This strategy takes time. It takes patience. You have to keep your eyes in the greater long term benefits. In the short term, you may even develop better relations with her and, as a consequence, have more sex.
When we find out all the things we now know about the JW religion, our rational minds wants to oppose, and oppose frontally. Some people, however, are not prepared to think rationally. They, too often, think with their emotions. With many women, we have to use some soft skills; we have to approach things psychologically, creating some small cracks in her shield. Bite. Blow, blow. Wait for another opportunity. Bite. Blow. Repeat.
Observador.