We do feel you were given a plausible explanation for Sharon's behavior. Whether or not it is the correct explanation, we don't know, and you probably cannot either.
Although it is extremely frustrating, you cannot expect that Sharon will change her tune all at once. She is most likely not going to suddenly believe you and start acknowleding you. She will likely be taking many steps forward and back. It may take her a very long time to come to terms with all that you are. This is, very understandably, going to be hard on you. But in spite of the set back, we think it still sounds like she is trying, even if she is sometimes failing. ~Emma