Changed name as Dh knows my log in and don't want him to see what I have posted.
Ok if we were both to die I want my 3 children to live with my sister and her husband effectively they would be their guardians. I have asked them and they are fine with it although we have nothing legally saying these are our wishes. MIL found out and had said to a mutual friend of ours that it would happen over her dead body and she would get them and my family wouldn't even get to see then ever. BTW MIL hates me and thinks my family are too working class for her 'type'
She had loads of money and I know would try to get them. Could she do this if DH and I passed away in an untimely fashion ,even though she is a mental head case?