Oh my..This is one of the not so uncommon confusions many therapists have about the word "boundary" which result in such stupid reactions to something the client suggests as a "boundary crossing.

First off, from your description, I understand that she was the one who suggested using the cushion as a "transitional object" in the first place. If she came up with the idea in the first place, why is she pissed off about your creative addition to her own idea? The suggestion of creating a "transitional object" for a client to hold on to itself is quite questionable to me to begin with, but for the sake of the argument I don't want to touch it because that's not the point I am trying to make.

The point is that the word "boundary" is very much misunderstood by both professionals and lay people. People think of a "boundary" as some sort of fence they should build between themselves and others, the fence that should never be crossed. One's personal or professional boundary is simply one's decisions about what one says "yes" and "no" to. That's it. Simple as that. Boundary is not a defensive barrier to protect oneself from others. This kind of idea of boundary promotes isolation instead of connections between humans that are so much needed in our connection hungry world. The healthy idea of boundary doesn't promote isolation. It promotes clarity of what one is and isn't willing to do in relationships with others.

That being said, when your T accused you of "pushing boundary", she was projecting her own confusion about boundaries on you. If she herself was clear about where her own boundary is, she wouldn't have any need to get angry at you. You have no power to "push" her boundary. If her boundary was intact, no one would have the power to change that. If she was strongly and deeply rooted in her clarity about what she is doing with you, she would have confidence in her boundary. When one is clear and confident about what they do, they don't get angry. They have no need to because they know that no one can push them into doing something they shouldn't do.

If your T is angry about your "pushing" her boundary (whether it is true or not), that means she herself is confused about where her "boundary" is. I am sorry you had to deal with her incompetent reactions and what sounds like her personal issue.