First time poster here and really don't know what to do next. It's more of a WWYD.
I have a DD of 16 who is consistently deceitful. Mostly around the use of devices and social media and she is, unfortunately, an accomplished liar.
Had a great relationship with her up until a few months ago. Started going downhill shortly before she was 16 (end of Y10/ beginning of Y11). I love her of course but don't like the way she behaves some of the time.
DD is outgoing and independent and has many hobbies we support financially and via ferrying her here, there and everywhere. She also has a boyfriend we facilitate her seeing (he lives a 40 min drive away). We support her in all she wants to do and she knows she is loved.
She has an ipad and the latest iphone. She knows we have her passcode and that we periodically check. We have restrictions on these devices following previous incidents.
Recently I discovered she had downloaded Tinder on her phone and had posted pictures of herself, one in a bikini. I was livid, deleted the account and restricted her phone such that she couldn't download any further apps. I also deleted Snapchat following issues with that too. We have had several discussions and arguments about the dangers of the internet, appropriate use of social media and the like. I don't trust her.
Anyway today Ihave discovered (via checking her messages - she knows that I periodically check her phone now) that her friend's boyfriend is going to give her his old phone so she has a secret one which she can use via wifi without us knowing. God knows what her intentions are. I am upset at this deceit and just don't know what to do and where to go with it.