Does A Wife Have Legal Power Of Attorney For Her Husband?

[Sage]

No, not unless you executed a POA appointing your wife as your attorney in fact. Marriage does not confer all the rights conferred by a power of attorney. A POA gives your agent widespread authority to act on your behalf in most legal matters excepting your will.
Your spouse can manage your joint accounts and jointly owned personal property. However, simply being your spouse does not give the authority to manage your solely owned property nor any interest you have in real property.