I spoke to my ardent JW mom yesterday.
Her--"That MotherF&cking azzhole hasn't paid me yet." She went on to curse and call someone, non-JW a few more names.
We chatted and hung up. I never said a word to her about her language. In front of other JWs, she is a picture of demureness. In front of family, she is like a character from the Soprano's. One of the men.
I learned every curse word I know from her. And I know some really dirty words.