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