How do you stop the lies?

[Sungem74]

I have a 13 y/o dd. She has lied constantly for years! Only ever small things and what most people class as 'fibs'
It got so bad recently though and I caught her with secret social media accounts and sexting. I took everything away and I had what I thought was a real heart to heart honest discussion with her, I've been paying for her to see a therapist and it all seemed to be on the right track.
Today I found our she's been stealing from exh whenever she's been there, money, clothes, toiletries. She admitted it and then said sorry, I'm just so angry I've sent her to her room! I don't know what else to do!!

There's an emotional need lying behind this. Hasn't the therapist been able to shed any light on it? Anger won't help - she'll feel more guilty and maybe try to hide it better. I don't think there's an easy fix but have you tried listening to her worries or asking her what she is thinking /feeling before and after she does this?