Dear Mr. Moore,
She is the legal owner as she is the only one appearing on the deeds. After the divorce, if married in spouses joint property ( regime by default in Spanish marriages ), the assets will be liquidated according to that. If the house is the conjugal address, you are allowed to enter the property though preferably once she has been informed of your decision to enter the property to gather your things, arranging a date and time and that there are witnesses of your visit, so there are no misunderstandings nor she can claim that you took belongings without her consent.
Regards,
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