Your sister's husband is your children's uncle. They are his nieces and nephews.
Your sister's husband is your brother-in-law. Your brother-in-law's brother is not related to you and neither are his children. But he is your sister's brother-in-law and his children are your sister's nieces and nephews.
The English language recognizes no relationship between you and your husband's great uncle.
He is their Uncle and they are nieces and nephews.
Yes, Margot Fonteyn's husband, Roberto Arias, had children from a previous relationship. They did not have children together.
Your husband's sister is your sister in-law.
There is no current law prohibiting you from living with a man who is not the father of your children. If you marry him, he becomes their stepfather.This in no way changes the relationship between the father and the children, he is not their ex-father he is only the ex husband. You may need to remind him of this, if he is worried about his relationship with his children. Unless he is abusive, the children need to see their father and continue the bond with him.
Your husband's mother's sister is your husband's aunt. She is not realted to you.
Ignore it until it persists.
They would be first cousins.
between your grandaughter husband, and you? if you have a granddaughter husband, you may not want to make that public. i don't know if that's legal.
Georgia O'Keeffe had no children, this was a decision made between herself and her husband, Alfred Stieglitz.