Do you think a convo would be better than an email? I think the email sounds rather critical. If you do want to send an email, perhaps look for ways to soften it - perhaps like - I know we both want a state and secure environment for the children and I'm onboard with them going to a better school, but it would help to know a little more about the circumstances of the move. I'm concerned about the additional travel for example.
I would avoid pointing out problems like - you consistently rely on your mother or myself. Stuff like that is likely to annoy her. Perhaps instead you could ask, how would you see this working in terms of your travel commitments.
And instead of saying it was inappropriate for you never to discuss your new relationship - perhaps suggest it is helpful if you can share any significant developments with each other.
So, I guess I feel it needs a significant rewrite. My other comment would be - she plans to move 20 mins away and possibly in with OM. You may not be thrilled about that plan, but presumably if she decides to go ahead, is there much you can do about it?
Just my thoughts anyway Mahhhty and hope they are helpful
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus