Need Help before I blow a fuse - Part 2

[20&lost]

This past weekend my D was upset and actually talked about harming herself and that one of the main reasons was because of my W. My D would not elaborate but did say she would like my W to attend one of her counseling sessions and that maybe then she could say what she means. My D told my W that I understood her. This all made my W very upset and I told her to call the counselor and setup a meeting with the three of them and then set one up with the counselor, me and W. It has been a very long road the last few days. As of today my W still was not setup a meeting. I am giving her to the end of today and then I will setup meetings. I still need to find a way to get concrete evidence of an A but just do not know how to go about doing it. My W is very tech savvy and thinks I am currently tracking her, which I am not. What is a good way to get solid evidence?