If it were me, I would call his mother and ask her to dinner at my house or to a restaurant some where. If you don’t feel comfortable with that have your man call and you both have his parents over or go some where. I would tell her how I really felt. Honestly I think you could explain it better than he could. I am sure his family is thinking all kinds of stuff. You can’t really be mad at him as I am sure even though you have told him what to say, he might be afraid that he might explain it wrong? I really think if you explain to his parents or whomever they will understand and not think its them.