High school junior here. I was flirting with one girl (kind of a close friend) in a group in class and she was showing me her phone so I decided to take a picture of her with it. She didnt seem to mind at all and seemed pretty amused and her friend just goes "SOOO CREEPY!" out loud for her friends and me to hear...is this a shit test? If so, what should the response have been?

Thanks a ton guys.