Hi brynro,

By not revisiting the sister trip before committing to the friends’ trip, you unintentionally hurt your sister’s feelings, but the sister trip hadn’t yet materialized into anything at all,  and because the invitation for the friends’ trip was last-minute, you needed to quickly accept or decline it, so I see why you did what you did. We can’t always anticipate how our decisions will affect others. You made a genuine, heartfelt apology which was the right thing to do, and yes, her anger is out of proportion.

B