The sad truth is that family members are often as bad as the hired help.
My Dad and his sister and brother found out about this after he had died. When they got the insurance money that my grandfather had left to them, they split it between themselves and she was left out. When she complained, they explained to her that she had already taken her portion.
I was shocked to learn what she had done when my Dad told me the details. She didn't ever seem like the type of person who would do such a thing; but, she did.