Considering all she has done to you, I don't think a switch flipped in her head and made her want make it all better.
For all we know, she could have been fighting with OM. She might have been texting him about what she was doing with you.
Maybe, she couldn't have Mr. Right (OM), so she settled for Mr. Right Now (You).
Maybe she wanted to throw you off your game, knowing full well you'd fall for it. She'll get full control of you again, and you are overseas for several months. She may have wanted to regain the status quo.
We have no way of knowing what is going through her mind.
I know how badly you want your family together, but if you jump right back in without any work done by her, you'll be right back her in a very short time.
You need to slow down and step back. Her actions are more important than her words. The fact that she hasn't called you, speaks to me.