Co-Worker's Husband's Fantasy

Cathy and Bob were your “so-so” typical husband and wife when it came to their relationship and more importantly, their sexual relationship. Both of them had sexual preferences that they like and one of these preferences that Bob particularly enjoyed was having anal intercourse with Cathy. There was one problem though, Cathy really did not like having intercourse in her ass. She did not get any pleasure from it and it was painful to her also.
One day Cathy was having lunch with her coworker,...