Daughters of one (or both) the same parents are either sisters or half sisters.
Your daughter-in-law's sister is not related to you, unless she is married to another one of your son's.
Your daughter-in-law's sister is not related to you, unless she is married to another one of your son's.
Your grandchild through one daughter and your great grandchild through another daughter are second cousins, once removed.
No, he only has one daughter.
Your cousin's wife is not related to you or to your daughter - unless your daughter marries their son or your wife is related to your cousin's wife.
Your sister-in-law's husband may be your brother. If so then the brother-in-law is either your husband, in which case the daughter is your daughter; or the brother-in-law is your brother, so the daughter is your niece or the brother-in-law is the brother of another sibling's spouse, in which case the daughter is still your niece If your sister-in-law's husband is not your brother, then he is not related to you and his brother-in-law's daughter is not related to you.
Your husband's cousin is not related to you. His/her daughter is not related to you either.
They are second cousins
Your daughter would b related to her uncles child because they would b cousins
They are not related by blood; they marry one another.
If you are female, your sister's brother-in-law could be your husband. Then his daughter is either your daughter or your step daughter. Your sister's brother-in-law could also be the husband of another sister. Then her daughter would be your niece. Otherwise, there is no relationship as you do not share a common ancestor.
No they aren't sisters. The closest for Aria and Holly to be related is being on camera and pretending to be mother and daughter to one another.