I would not assume that she will judge you for your decisions. I see a Christian T now, and she is very non-judgemental. My first T was an atheist, and I felt the most judged by her. It really depends on the T and how good and accepting that T is rather than the T's religion in my opinion. I am a Christian and do specifically see a Christian T for Christian counseling. Even then, she does not steer me regarding issues unless I specifically request that or ask her.

As this seems to bother you, then I would just ask her, point-blank, how she lets her religion affect her counseling and tell her that you are worried that she may judge you harshly for your lifestyle and decisions. If you don't like her answers or feel comfortable, then you can move on.