My 80 year old sister's health is declining and she wants to update her will/trust. Problem is, her husband is extremely difficult (cunning, manipulative, narcissitic, revengeful, etc.). This is a second marriage for both. There are 5 children between them and they are to share in whatever is left upon the demise of their parents. Problem is, my sis has a condo which is in only her name. Step-son thinks he should have access to this asset as well. She bought this with her own money as she also did with the household furnishings. Because of the extreme trust issues with both my sister's husband and step-son, she thinks it best to have an irrevocable trust to protect her interests and that of her children. Does anyone have any experience with this type of situation?