The granddaughter-in-law of one's spouse's sibling.
My co-grandniece-in-law is a good person.
by Elivaldeq November 24, 2019




Spouse's great-grandnephew's wife.
My co-great-grandniece-in-law is a good person.
by JAMP12 September 21, 2021


My grandniece-in-law is a good person.
by Elivaldeq November 24, 2019
