My T allows me the silence. Mostly only for a certain amount of time. There have been very few times but there have been some, where she's let the silence go on. Usually these are when I am angry and refusing to talk because of trying to control my anger. Otherwise, after a few moments if I have not shaken myself clear of whatever, she'll make a comment about it being hard to talk about, and we'll often talk a little bit about why I'm struggling to talk about something - like I can't seem to find the right word, or the thoughts are moving too quickly/shifting too quickly.