AITA for telling my sister to stop taking pictures of my husband while we were at the beach?

My sister takes a lot of pictures of my son but I’ve noticed she does it excessively when he’s with my husband. I thought I was being paranoid at first but we all went on vacation together and she was constantly taking pictures of them. My husband even commented on how many pictures she was taking of him.

I asked her to stop taking pictures of him because she was doing it while we were at the beach and it was weird. She was embarrassed because I said it in front of everybody so she got defensive and claimed she was taking it of my son but either way my husband was still in the pictures. I told her to stop again which upset her and she started giving me the silent treatment.

Later on, my parents pulled me aside and told me I shouldn’t have said that to her the way I did because I embarrassed her and now she wanted to go home. They asked me to apologise but I told them she was being weird and she didn’t need that many pictures of my husband or my son.

AITA?