LW doesn't want their son to feel hurt or violated, but can't yet say they dosn't want to keep being hurt and violated by this husband. Because maybe they have a safe word for their interactions, but he knows he is teaching the baby to bite the LW for his own nonconsensual sadistic pleasure and he's calling the LW "hysterical" --typical toxic misogynist gaslighting term usually lobbed at women, but all still apply, whatever LW's gender identification, to demean them--because he resents safe words binding his sadistic wants and I would bet he won't accept boundaries anyone else sets on his manly pleasure. It's not only the baby who he is abusing deeply.

I say skip the counseling--it will do nothing here after LW explained the power issues in relation to the baby multiple times well enough and got reduced to a wandering womb by him in return--take the baby who can't protect himself and for both your sakes get the hell out now . Take pics of the marks to use in court.