I would take the money and sit through the meetings. That way you can make comments during the meeting to the effect that you are being paid by your father to be there. You would make the meetings so much more interesting for everyone in attendance. It's really the least you could do.
Why don't JW parents learn from the lesson of the prodigal son? The son who ended up most favored was the one who squandered his half of the inheritance on worldly pursuits.