it sounds like parts of you really do want to talk but are afraid. therapy is a safe place to talk. please talk to t about your other parts. she will make it a safe place for them to talk about what has happened to you all.
if you were abused and this family member was the abuser and is now taking care of another family member, is this family member in danger of being abused as well? if so, please speak up to someone about the abuse so that your other family member does not go thru the same abuse you went thru.
it is time to talk. take care of yourself.