Every psychologist adheres to a code of professional ethics. From what you’ve written, it appears that your psychologist is violating that code. Take a look at: https://www.dshs.state.tx.us/counselor/lpc_ethics.shtm. That code specifically forbids soliciting clients and getting into a dual role. She has become much too entangled with your life.
It’s hard for me to imagine any problem that requires 15 years of therapy with sessions of 3 – 8 hours a day as well as weekend visits. Learning how to cope with stress and how to improve the relationship with in-laws is often short term therapy. You are not obliged to accept phone calls that she initiates, much less pay for them. Shopping isn’t therapy. Neither is going to shows you don’t like. The fact that she is asking you to keep her behavior secret is a huge red flag.
I suggest you file a complaint with the Board of Registration of Psychologists for your state. Here’s the link to the complaint form and instructions. http://www.tsbep.texas.gov/how-to-file-a-complaint-enforcement. I have limited information. The Board will want to hear your complete story and then will make a determination.
I advise you not to tell the therapist that you are filing a complaint. From what you’ve told me, she will make every effort to talk you out of it and probably bill you while she is doing so. A therapist who is doing legitimate work has nothing to fear from a Board investigation.
I’m very glad you wrote. I hope you will now take this situation to the Board.
I wish you well.