My thoughts about this are that the changes in boundaries are not very likely, unless some borderline'ish features start to emerge. It's not entirely impossible that this will happen, considering that you seem to have repressed a lot of you for a long time. Who knows what you will find from within.

However, just based on reading about how your therapy is proceeding right now, it doesn't seem like there is any reason for your T to change the boundaries (unless something unexpected happens in her life of course, which in that case would have nothing to do with you though).