Conclusion
First of all, Cynthia is a fool unless she recognizes that all abuse comes from the heart! Tommy is not just speaking the words when he calls her a 'rich piece of cunt', he is feeling the feeling.
If she finds that there is a real caring relationship with her garage mechanic lover, then she really ought to continue it and pursue it. But if it is merely a device for her to fulfill her fantasy needs, then it is destructive to both of the parties involved.
My suggestion is that Cynthia and her husband both go into extensive sex therapy. The first thing that they need to be taught is that the words 'Fuck', 'Cunt' and etc. are not dirty words. They are exciting, descriptive words for pleasurable acts and beautiful things.
The hopeful results of sex therapy on this couple would be for Carlyle to permit Cynthia to use her dirty words while they engage in sex. It seems that his old-fashioned prudery makes him the one with the bigger problem.
GENERAL