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As the principal place of business for one or more of your trades or businesses.
As a place to meet or deal with patients, clients, or customers in the normal course of one or more of your trades or businesses.
If your home office is a separate structure, in connection with one or more of your trades or businesses.
You can use your home office for more than one business activity, but you cannot use it for any nonbusiness (personal) activities."
Based on the information you provided, I see no problem with both you and your husband claiming an office in the home deduction as long as you meet the above stated criteria.
I hope this helps.