There is a whole lot going on here.  And while I understand that there may be an underlying reason to sell the van and split the proceeds only 2 ways, your husband would be violating his duties under the trust - which is a fiduciary duty - and that is a serious issue.  So is what the other brother did as co-trustee and I think that your husband has a fiduciary obligation here to go after his brother not for their own benefit but for the benefit of their sister.  He really can not just refuse topursue the matter. He has a legal obligation to pursue the matter.  No attorney can advise you to violate your duty under the trust and how to transfer the van legally - because it would not be legal.  Please, seek help in straightening this out.  Good luck.