T3 has said that she would ask her "group" about how to proceed with generational stuff with a person with DID. She has mentioned that group a couple of times, I believe it is a group of peers who discuss challenging situations with each other. I am fine with her seeking knowledge from the group and I trust that she will make a good decision about how to proceed.

T1 for sure does not have supervision (I think a supervisor would have intervened in my case) and I am pretty sure T2 doesn't