Quotes about father-in-law
A collection of quotes on the topic of law, father, father-in-law, in-laws.
Quotes about father-in-law

Letter to Vadian, ibid, March 7, 1526, p.252

In, p. 11.
Gulzarilal Nanda: A Life in the Service of the People

[Standing Bear, Luther, My People the Sioux, November 1, 2006, University of Nebraska Press, 9780803293328, 211-12, https://books.google.com/books?id=ltSXg-abnU4C, 1 March 2018]

Charles Mallinson in Ch. 19; Charles Mallinson's mother, Maggie, and his uncle, Gavin Stevens, besides being their parents' only children, are twins.
The Town (1957)
“In the twelfth year of his reign, when Edward was feasting at Windsor, where he often used to stay, his father-in-law, the traitor Godwine, was lying next to him, and said, "It has frequently been falsely reported to you, king, that I have been intent on your betrayal. But if the God of heaven is true and just, may He grant that this little piece of bread shall not pass my throat if I have ever thought of betraying you." But the true and just God heard the voice of the traitor, and in a short time he was choked by that very bread, and tasted endless death.”
Edwardus, duodecimo anno regni sui, cum pranderet apud Windlesore, ubi plurimum manere solebat, Godwinus gener suus et proditor, recumbens iuxta eum, dixit: "Sepe tibi rex falso delatum est me prodicioni tue inuigilasse. Sed si Deus celi uerax et iustus est, hoc panis frustrulum concedat ne michi guttur pertranseat, si umquam te prodere uel cogitauerim." Deus autem uerax et iustus audiuit uocem proditoris, et mox eodem pane strangulatus, mortem pregustauit eternam.
Edwardus, duodecimo anno regni sui, cum pranderet apud Windlesore, ubi plurimum manere solebat, Godwinus gener suus et proditor, recumbens iuxta eum, dixit: "Sepe tibi rex falso delatum est me prodicioni tue inuigilasse. Sed si Deus celi uerax et iustus est, hoc panis frustrulum concedat ne michi guttur pertranseat, si umquam te prodere uel cogitauerim."
Deus autem uerax et iustus audiuit uocem proditoris, et mox eodem pane strangulatus, mortem pregustauit eternam.
Book VI, §23, pp. 378-9
Historia Anglorum (The History of the English People)

“T is a very fine thing to be father-in-law
To a very magnificent three-tailed Bashaw!”
Blue Beard, Act ii, Scene 5, reported in Bartlett's Familiar Quotations, 10th ed. (1919).