First of all never talk to people on his behalf , i know its coming from à good place but people with stuttering and anxiety should always face there problemson their own, thats the only way to heal from it . For the work related stuff , i dont think the Lady will bother him again after he called her a bitch , a slight confrontation is normaly all it takes for the bully to back off . I wish you and your husband the best , this stuff get sorted out by time and courage