Your grandmother's sister is your great aunt
First cousins, as you share a common grandparent.
your cousin
Your grandfather's brother is your great uncle and your parent's uncle.
Real sister, half sister, or step sister
sister in law.
Your sister's sister is your sister.
Grandads-Robbers was created in 1971.
The duration of Grandads-Robbers is 1.45 hours.
No relation whatsoever. You will be an aunt or uncle to your sister's child and your brother-in-law's sister will be the child's aunt, but that's as close as it gets.
Your mothers sister is your Aunt
There is no relation. Your not blood at all so your just really good friends.
sister-in-law