I understand why you are angry. I understand why you wished you could have spoken to T before any action was taken. I understand why it may feel like a violation of your rights, too.

However... the law about mandatory reporting takes precedence over your feelings, in this case.
The best interests of the children involved take precedence over your feelings, in this case.

I understand how scary and triggering this whole thing has been for you, I really do. In the same circumstances I'd be livid, too.

My feeling is his hands were tied. He didn't have any choice. Once he knew, it was HIS responsibility and his alone to report it to the authorities. Regardless of what you did or didn't do. Whether you did or didn't call it in yourself was irrelevant - once he had the knowledge, as a T, he was legally bound to make sure it was reported.

Even though to do that he had to go against what you had asked.
Even though to do that he knew he had to betray you, in a sense.
Even though to do that he knew he would break your trust.

In this case, his legal responbility to the law and his moral responsibility to those children took precedence over his responsbility as a T to you.

And I bet he didn't like that as much as you didn't.