"He is not more worthy than I am." You are more than right on there!
I would think letting it out now with words and not rage can only be a good thing, especially in the long run. How could he ever come back if he thinks you are still holding in anger. If he has seen you release some, that could be good. (but I'm far from and expert of any kind of professional so I could be off base here).
Hang tight and keep being the rock for your girls.
(((hugs)))
Nature Girl M 40 H 40 M 15, T 19 D11 S9 bomb 3/07 (MOW)