((Mue)) I don't know what the group therapy is about that you participate in but I would bet there are people who have gone through experiences with CSA or abuse from a partner. I went through a group therapy program and while it was intense at times my best work was done when I let my guard down and was honest and open about my feelings.
Something about being in group therapy I found easier than individual T for some reason.

But you have to do what feels right for you in that moment. Perhaps talking about holding back your feelings and why or what that means for you?