Therapy is about being athuentic-go in and tell your T you are angry-tell her why and then you can do some work. 9 times out of 10- there is an underlying cause to why your angry and it will make for a good resourceful conversation with you T.

The first time I was angry at mine- I went in sat down and said "T- you are really pissing me off!" she said "wow! tell me why." and it turned out to be an awesome session.