I believe that Johnny Depp, most likely, DID throw the cell phone and it DID accidentally hit her in the face. If she were going to make up something related to Johnny Depp abusing her...one would think that she would say he actually hit her. (Probably the mark on her face wouldn't support actually contact with his hand or fist).
And, she is capitalizing on it...to make him look even worse than he already does.
As for his ex and children standing up for him - I don't know. He's their father and they don't was to see anything bad about him. But, quite honestly, he has not behaved very well for some time. It's time for him to bear the consequences of his actions. He left the mother of his kids (who clearly cares about him) for this gold digging young woman, 20 years his junior. He behaved like an a$$. Time to pay the piper.
I doubt the abuse claims will go very far. But, the wive will get some $$ out of him. Oh well, he has plenty of that...and will have plenty of opportunities to earn it back.
The loss of his reputation and what he has done to his family will (should) stay with him for a long time. Maybe this is what it takes for him to hit bottom and see what a jerk he's been?
Time will tell.
L