This is not a legal, but an ethical question. Ok, here is the situation: One sibling lived out of town. The other one lived in town. She visited her mother every day for the year that she was in the assisted living facility. She ran errands, helped with the nursing, wheeled her around, and kept her company. The other sibling emailed her mother but rarely visited (She did live 2000 miles away). The mother added the sibling that spent all the time with her to her joint bank account. In her will, she split the assets 50-50. The mother may not have realized that the joint bank account legally became the sibling’s once she died, even though the will stated that the assets be split 50-50. So the one sibling that took care of and spent time with the mother legally owns the bank account. They can take it all to the casino if they want to. So now the question become ethical. (The mother added the one child to her bank account to help with paying her bills, but it is still a question if she knew that the bank account would become the child’s on her death).