Geez, sorry to hear you're dealing with this. Breakups are never easy, but situations like this certainly don't help.
Kind of a tough one too. I mean, legally, they're still hers, but it sounds like they're better off in your care. I know if anything ever happened with me and my girl, my animals would be my top priority when moving.

I don't have a clue what the "right" answer is. I wish you the best and hope it all works out.