I'd be so pissed off! I'd grill him until he proves to me that he sold her the car. If there's not proof, more than likely he just gave it to her. It depends on how far you go with trust. But this is fishy. There should be no confusion on this situation! It would be somewhat understandable if he gave her the car ONLY IF the son lived with her. But he doesn't! He lives with you!...So...it depends on the understanding that you have w your hubby on how he 'deals with' the mother of his child. So many factors...so many variables.... But I don't want to give you any negative gas to blow up on. Work it out with your hubby, trust that his decision was a good one. Just as long as he didn't hurt your household in his decision to give/sell her/anyone the car...and just as long as he isn't taking advantage of your trust. Ask yourself...what bothers you more? The fact that it was his son's mother....or the fact that he sold/gave away a care without your knowlege? It's hard to separate the two because it was all in one act, but think it through.