Professional Investor: can offset spouse's income?

[Laura Thorne]

If I log the requisite 750 hours of real estate-related work a year and claim to be a professional investor, can I use my tax deductions from real estate to offset my spouse's ordinary income?  Or is the professional investor loophole only to offset the professional investor's income?  We do file jointly and the properties are in both of our names.  Thanks in advance!