Accidentally watched ex's instagram story,?

We broke us two years ago, i was searching for some one else on instagram, instagram suggested her profile, curiosity got the better end of me and started to look at her photos, i dont know what happened but i accidentally watched her story, now she made her account private. I dont like her anymore though, it was just my stupid curiosity. Should i apologize or just let it be? PS we are not following each other on social media.
Accidentally watched ex's instagram story,?
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