I wish you luck. I married a "worldly" woman so that was not an issue. Though religion was. It never came up during the divorce, but after that, I became agnostic. I didn't want my kids raised with religion.
She was about as religious as most. She "believes" but not enough to do much about it like go to church or read the bible. But ask her and she'll claim she's a believer. It came down to if she wants to take them on her weeks, go ahead.
Luckily, she's as lazy as she was during our marriage. She's not going to consistently get out of bed on a Sunday to take them to church. Hell. leaving her house is a burden. Even shopping she does online and picks up the order. So there was no chance she was going to take initiative and indoctrinate our kids.
Outside of that, my daughter had religious friends that sometimes invited her to church functions. Even on my weeks and I allowed it. If that's what they want to do, go do it. I hoped they didn't get indoctrinated, but I had to let them be with their friends and hope. I know from first hand experience of my own and seeing other JWs. Banning something usually backfires. The strictest parents often had the most rebellious children. Tell your kids NO, ABSOLUTELY NOT and that's all they want to do.
Occasionally I'd be watching atheist cartoon videos by the likes of NonStampCollector on YouTube and the kids would hear it and come watch the cartoon. So I think I was being passive about religion. I wasn't purposely drilling no-religion into them, but there were times they'd ask about it or come see what I was watching and stay.
As a result, my daughter is mad at me for not giving her the hope of a heaven (not that she's religious either, but somebody put that thought in her head). She still doesn't believe, but she's mad at me for not giving her that false hope. Knowing she's going to die someday and that's all there is has caused her fear. My son is pretty like-minded to me. He even argued with Mormons on the existence of god in a parking lot when he was in grade school.
I may not have any advice on your situation unless my experience helps. And my belief that being too negative against JWs might drive them to being JWs.
My advice for others is never get involved with a JW or disfellowshipped JW. I know many disfellowshipped people who still believe the JWs. They just gave into the moment (usually sex) and got disfellowshipped. But now that the moment is gone. They're older and wiser, but they still believe the JWs are the one true religion and they need to repent and return someday.
So don't go with a JW or disfellowshipped one - UNLESS they firmly believe the JW religion is WRONG. Even my ex-wife worried I might return to the JWs. It's good she divorced because if she thinks that, she never knew me and has NO IDEA what I think of the JWs. Apostate JWs are better, IMO. Though not all apostates stay apostates.
