FY, I think I am in agreement on the letter. You cant take it back. And it can be used in the future however she wants to.
I also think that they can sense a shift in us. Though she might not understand exactly what it is she's feeling. That might be the reason why she is warming up.
Feelings are ever changing depending on many things.
I think you are ready for a shift in some way as limbo can be exasperating at times.
I can also tell that you are calm and steady, I am the same way. But even we can have days when we get affected by stuff,right?