Have you tried pointing out the hypocrisy of her actions? I never considered using sex as a weapon when my husband woke up before me. What about "your fine conduct may win them over/[back]"? And "render the marriage due"?
I don't mean to add fuel to your fire but as an honest onlooker's opinion, it seems to me your wife is a mean and spiteful person at heart, addition to and beyond the WT's influence.