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HelloThis is Samuel and I will discuss this and provide you information in this regard.
CA is a Community Property state. That means that any assets acquired during the marriage become subject to a 50/50 split. Now, if you did not get the equity line and her name was never put on the house, then it would remain your separate property in regard to anything you had invested in the home before the commingling of the home via the name put on the Deed.
As it stands, your wife is going to have a claim to 50 percent of the value of the home.