I think you might have answered your own question..your husband is soft spoken and gentle, the pup views him more as a 'playmate', than someone to respect..
I would have your husband up his interactions with him, and go back and take that obedience class with only him..
Since your more experienced, have your husband start doing what YOU do with the puppy.
I'd say this is just really rough play, puppy knowing he can get away with stuff with your husband that he can't with you and the kids....Good luck !
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