Nah, I don't give a schit about the picture that it is going to paint. I broke up with the ex because of the very reason that I found work in another province. For no other reason.
I am no Dr Phill..... but it sounds like you've made your mind up already, 2 for the price of one, The Ex and her Mother in this case.
Also leaving your SO for work is a bit fishy to say the least, who does that? What happens if you get another job in a different province again?
Lastly, going back to your Ex yeah it could work, but in my humble opinion if it hasn't worked the 1st time round then chances are...