People get addicted to and/or abuse legally prescribed pain medication all the time. I'm not saying that is the case here; obviously we don't have enough information to know. But there has to be a reason that a drug screen was done in the first place.
It appears that the mom must have had some concern for the child's well-being that is related to dad's use of medication.
It appears that the mom must have had some concern for the child's well-being that is related to dad's use of medication.