What should my children and I do regarding my husband's money earned from his work as a medical representative, which is considered bribery? Is this money considered mixed (halal and haram)? And is my husband's advice sufficient to absolve me of responsibility for this money?

It was stated in a previous fatwa that what pharmaceutical companies and the like offer to doctors and pharmacists in terms of medicines is a forbidden bribe. Therefore, your husband must desist from this, and you must advise and admonish him. You must continue to advise him and not despair. As for eating from his money, there is no sin upon you in doing so, even if there is a suspicion of it being unlawful.