Responsibility or Respect?

I was listening to a nationally syndicated radio personality this afternoon and the subject of cheating came up on his show.

There was a caller that said that she is not responsible for another person's relationship or marriage. I was completely stunned. There were other callers that cosigned this woman's sentiment.

It dawned on me that she used that line as an excuse to justify sleeping with married men and that enraged me. You say you are not responsible for another person's relationship or marriage but what about respecting it.

I supposed that respecting someones marriage or relationship is old fashioned.