Husband trying to prove I had an affair.

Me and my husband are going through a divorce. His lawyer had requested my cell phone logs, text logs, statements, bills ect. I am a nurse who works with 25 patients and I work close with a therapist who is over the therapy department. We use our cell phones to txt & call each other related to work.these at not company phones. At times we text and talk about our family, kids, church, and some of our favorite hobbies. We consider each other a friend. I was looking through my phone records and I noticed there are significant text and some calls made between us. There was one where i couldnt sleep nor could he and we text up until 4am, but we only text about our favorite hobbies TV show we were watching and sending bible quotes to each other. We have never been anywhere together, nor have we kissed or had any sexual relations with each other. Can this be proved of adultery? I told the therapist about the situation and he said that if he had to testify he would. Can he do that?