It does not sound like your therapist is working for you any longer. I would get an appointment with another couple to see if one of them might work too and then terminate with this one.

One thing, are you sure she is texting and not taking notes in some way? I take notes on my phone. I would perhaps, next time she picks up her phone and starts typing I would quit talking/change the subject and ask her, "Are you taking notes? I thought you used your iPad for that?"