I was holding her phone, and I saw a text I wasn’t meant to see

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.

It turns out my sister had spent the entire vacation texting about my “B.S.,” my inability to do anything competently and even referenced something that happened years before.

I had noticed her constant texting but said nothing because I didn’t want to risk an argument.

I am still angry about this and don’t know how to let it go. I really don’t want to travel with her again, since I know the invisible third party will be with us the whole time.

How do I deal with this?

— STAYING PUT IN NEW JERSEY