No she is not entitled to your mom's house, it is your separate property.
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Normally an inherited piece of real estate would remain your separate property. However, the presumption of all property is that it is community property, so be careful and hire a good lawyer if you get divorced. It is also possible that the community estate could make a claim against the house for reimbursement or under another theory. It is pretty complex sometimes.
This information is not legal advice and does not form an attorney-client relationship.
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