Sorry to stir, but if the OP's DH was a solicitor he knew perfectly well what he was doing. If he left money to the OP, it is hers to do what she will. I know fairness comes into it, but it is still her own dosh to dispose of as she wishes, after the considerable bequests to his offspring!
True, try to ignore your SS as he is the sort who will never feel that he has been fairly treated. I know having been the injured party on the death of DM; siblings took everything, even things promised to my DCs... the fall out was horrible, and I no longer speak to siblings as each time I open my mouth, pure acid comes out from theirs. 