Honor , thy Sister? - SM

In chapter 19, the reader catches a glimpse of how honorable Kit is.  She was willing to give up her life before she told the judge why she had written Prudence name on the board over and over.

This brought to mind the times when I had been asked to repeat what a friend or sister had told me in secrecy.  For instance, I remember when my sister had went to a party , instead of the movies.  She told me where she was going and asked me not to tell mom.  Well, my sister went an hour past curfew that night and my mom had started to wonder if anything had happened to her.  My mom asked me if I knew whether my sister was going anywhere else after the movies, and unsure of what to say I just shrugged my shoulders.  Happily to say, that nothing dastardly happened to my sister that night, except her punishment.  But, what if something had happened?  Should I have told my mom where my sister had went even though I would have been breaking my honor towards my sister?