relative-in-law

He was the one who was going to pose as secretary, valet or utility man to his future relative-in-law.

The Four Horsemen of the Apocalypse. (Los Cuatro Jinetes del Apocalipsis) from the Spanish of Vincente Blasco Ibanez; authorized translation by Charlotte Brewster Jordan. 1918

I was sitting by the window of the drawing-room, awaiting her arrival and gazing at the panorama of Boston Bay and the intervening hills, when an old lady, a relative-in-law of "Cousin Melissa," stole in.

Marion Harland's autobiography : the story of a long life, 1910

Unlike Western weddings, in which the ceremony is primarily about the bride and groom, the tea ceremony shifts the focus from the couple to their elders; it serves as an opportunity for the couple to honor and show their appreciation for their parents, grandparents, and close relatives, as well as an occasion for the elders to welcome formally their new relative-in-law into the family.

Weddingbee 2009

We all have experienced the feel of individual main following to the house and whether the visitor is an relative-in-law an old friend or business companion you know the drill Have the house in show status

We Blog A Lot 2008

"The advice of a relative-in-law in a case of this kind has never yet been known to be of any real use, Millie.

The Limit Ada Leverson 1897