I really don't know. I haven't come across any limits about what I can talk about, but since all the topics are about me and it is my therapy I can't imagine that any topic would be inappropriate.
Once a little alter started to ask T if her father had ever raped her but an older one jumped in and stopped that. That part of us was innocent enough in her wanting to ask but the older one didn't want to put t in that potentially awkward spot.