Wow,
I would think that your counselor would want you BOTH to be more open, but maybe I am misunderstanding this. I guess that maybe there would be some privacy with events that pertain to their children and all that, but I would think that he would want you to be involved. But I dont' have that situation, so I guess that maybe I don't understand everything. That is just my opinion.
Do you guys have the kids, or does the ex? If you two have the children, I would think that you should be involved in the situation. If she has them, well, maybe that would be a different story.
In my relationship with my husband, we have grandkids on his side. I didn't have any of my own. I am involved in everything, except what goes on between him and his sons. But that is a different story all together. He doesn't have contact with his ex whatsoever. So that is good.
I hope that things work out for you and I hope that you continue counseling. You need to vent and be able to hash things out with somebody. I am glad that you have come here to do that.
Best wishes for a wonderful day.
Hugs, Karen