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If she tried to divorce him, he would find her.
In fact, Jo Wilson isnt even her real name.

Credit: ABC/Mitch Haaseth
Alex responds, well, just about how youd expect him to: by punching DeLuca.
How will this change things with Jolex?
And who is Jo Wilson,really?
EW turned to Luddington to find out:
ENTERTAINMENT WEEKLY: Jo Wilson is not Jo Wilson!
How long have you known that about her?
CAMILLA LUDDINGTON:I really didnt know much at all.
I knew midway through the season that Shonda [Rhimes] was wanting to explore her backstory.
I had no idea until the table read that Jo was married.
I had no idea that her name wasnt Jo Wilson, too.
That was completely shocking.
Nobody else knew at the table read either, so everyone was gasping at the table read.
I still have no idea what her name is.
What was your reaction to learning about this abusive past?
I was thinking about this myself in going back and thinking about other moments.
I dont think it was the reason why she left him hanging.
She wants to see where the relationship was going.
She thinks that filing for divorce papers would out where she is.
Shes been living in secret.
It would also be dangerous for Alex.
It was really difficult to play.
It was really heartbreaking to play.
Worse, Alex catches her half-naked and drunk in bed with DeLuca.
How does that damage the trust between Jo and Alex?
That was the last scene we filmed.
We may have even filmed all of that finale in chronological order for me personally.
I was thinking, I dont know how she can recover from this.
I wonder if its just all too much to recover from.
Does this force her hand to be honest about her husband with Alex?
I have no idea.
She already thought shes lost him by the time she gets in that bar with DeLuca.
Still, that wasnt enough to tell him.
Thats how frightened she is about it and how much she thinks that shes also trying to protect Alex.
Its a really sad situation.
Hes like, I dont know.
Alex really wants a normal married life.
Right now, Jo can offer him anything but.
Because I would understand.
Again, she feels like shes protecting him.
Presumably were going to meet Jos husband.
We have no idea, just like how I literally didnt know any of this backstory until recently.
I want him to come in, and I dont want him to.
Itll make for a very interesting story line.
Who would be your dream casting to play Jos abusive husband?
I think that its actually important for him to be charismatic, because hes described that way.
I think thats why she originally fell for him.
I hope that its someone charismatic.
Jo also fears Alex will go after her husband.
If we do get to meet him next season, do you expect that to be the case?
I mean, look at the way Alex went after DeLuca.
I cant even imagine.
Greys Anatomywill return this fall on ABC.
Plus: Sara Ramirezexitsahead of season 13.