If you are married, you must file married filing jointly to enjoy the deductions and credits. Married couple can file married filing separately (MFS) but there are some catches. And most of the cases you will be loosing certain credits because of MFS.

When you file, MFS the important rule, if you itemize, you spouse has to itemize too. Deductions are based on Apples to apples, oranges to oranges. Your are itemizing that mean she can not get standard deduction. She has to itemize and her itemized deduction will be $-0- , will lead to a higher taxable income. She will be pay more tax that your calculation.

Please, have new calculations as I said you will get your answer. Now you knew what to do.