I think this is best encapsulated by the phrase "no relation".
Unless you're trying to be clever, in which case the answer is "Mom."
However, that's not all that clever really, since your mother's brother-in-law could himself have brothers and thus potentially sisters-in-law other than your mother.
well they are family members and brothers want to protect their sisters in anyway. the knowledge that someone is fooling aroud with a brothers sister as not at all appeasing and also they do not want their sister to be heartbroken or ruined by this other man
Someone who is afflicted is someone who suffers from something. Although we may suffer from migraines, bedbugs or mothers-in-law, we are afflicted by migraines, bedbugs or mothers-in-law.
If you are best friends with someone, maybe since childhood, and your parents have not met your best friends family you would want them to meet. Maybe the sister has been talking about her brother to them. It's just a friendship/family thing you do. Most likely have the best friend met your husband and his sisters parents. There is already a bond.
That all depends on the people that make up that relationship.
No Jada Grace and Skai Jackson are not sisters why would someone even think that
Then someone else is and must follow the wishes of the deceased.
When they were still in the mothers whom, and she took a fall.
No, the baby is not considered your husbands. (If you are sure that the baby was because of someone else, and not your husband.)
Many people choose to sign something on behalf of someone else. Typically wives and husbands will sign on behalf of their partner.
A gatecrasher.
someone`s daughter
No it doesnt need the fathers name unless the father is there