Sister signed over house 4 years ago can she get some equity in a divorce?

She is getting a divorce. Foolishly she signed over the house 4 years ago, 'claiming she didn't know what she was doing'. She has also said she did it because her husband told her that he had to because her credit was bad. This was prior to the marriage troubles (seems like hindsight is 20 20 now) Regardless, the house is in deep forclosure but there is surprisingly about 100K equity still possible. Is there some way she can claim 1/2 of the sale?
We are in California