DEAR ABBY: A few years ago, my sister and I took our kids on vacation together. She and I get along but have never been close. Sometimes I walk on eggshells around her because I never know what might make her upset.

I thought we were having a good time on that vacation and getting along well, even though I was anxious. We were both taking pictures with our phones, and she handed me hers to forward myself some of the pictures. While I was looking at them, a text message pinged, and I checked it without thinking about it not being my phone.

Write to Dear Abby at www.DearAbby.com or P.O. Box 69440, Los Angeles, CA 90069.