Beth,
My concern in all you're telling me is that SW is asking for something that easy child cannot & most likely should not have to do at this point in her young life.
What is SWs "agenda" behind getting easy child on board? Is it a treatment plan written up with-o informed consent by you or your easy child? The problem, as I see it, isn't easy child - it's difficult child's ability to write that letter & accept however easy child responds.
None of this is on easy child's shoulders.
Having said that, while both kt & wm, have letters of apology they have written to one another; have worked & not worked toward a relationship of sorts there are certain relationships that may be doomed to being toxic.
in my humble opinion, abuse, of any type, puts a relationship in the "toxic" zone. Our team doesn't expect or necessarily want the tweedles to have a sibling relationship. Our goal is to teach them to be in the same room with one another with-o disintegrating to that ugly picture of survival from bio home. At best, I would expect them to see one another on an occasional basis (like now) & let it go.
It just seems that SW has some kind of "discharge" agenda based on PCs response to this letter. Am I off base here?