Anonymous wrote:OP here. I'm worried about cyberbullying because of details I didn't share above (since my post was long enough): the new friend is a queen bee who has teased DD in the past and has never been to our house. She came along with the old friend, and frankly, I was surprised to see her. When she had to leave so quickly, I wondered if filming a potentially humiliating video wasn't the whole purpose of the visit. DD said this girl told her she'll come back and they'll do it again.
DD is pretty easily played, and as I mentioned, she doesn't know thing one about smartphones. I overheard her asking all sorts of questions to the queen bee, and the queen bee seemed very amused she'd never heard of Siri, etc.
I don't know the mom, at all. I had thought only the old friend was coming over and was a little taken aback when the queen bee showed up with her. So, there's another story behind all this.
I'm 20:39 and I wrote that I thought you were over reacting but these details make a huge difference. You have a specific reason to think this girl could be up to no good. If she comes back I would follow the advice of others and just say that smart phones aren't allowed and take it at the door. You can say its your rule for everyone but I would only use it with this girl, or with everyone until you feel better about this girl. She may roll her eyes and not want to play with your DD anymore, but then you'll know that she wasn't interested in your DD, she had another agenda.