Thank you for your new question.
Yes, your wife on active duty can be an advisor to the LLC. As far as billing the DOD, that is up to the DOD as to whether or not they are willing to contract
with you to provide services and in that case you have to disclose she is an advisor to the LLC as she would be a military member and the military is likely to consider this a potential conflict of interest which they would have to evaluate (and they do on a case by case basis).
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