Sorry therapy did not go as you thought it would, but bear in mind that most therapists try to gain the trust of their clients in the early sessions and hold back from challenging their views until that trust is established.
with regard to the children, I've noticed a lot of posters saying once they were out their children followed suit, that's been the case with my teenage daughter who until recently appeared to be very enthusiastic about the religion. After all, most kids just want to fit in and be accepted, given the choice between being 'normal' with birthday parties, Xmas etc, freedom to choose friends and sleep in at the weekend, compared to life as a jw, most will choose the normal option. (It seems harder when the kids are older in their 20s and have gone through all the pier pressure stuff and committed to the org, married a dub etc.. ) Don't bad mouth the wt or your wife but try to make it appealing to stay home with you.
You sound like you have a good marriage and she's not overly committed to the org, so when your show her you can be a good husband and have fun together with you out of the organisation, her attendance might well die off naturally. A lot of people find it hard to make a vocal 'decision' because of the guilt but drifting away might be the easy option for her, you could look happy and relaxed with a glass of wine in hand when she comes in tired after a meeting. Why not start fading if your hearts not in it? I've faded fast and the elders haven't bothered me.