Father-out-law

One day, in an argument with his wife, Haydar, he made a terrible mistake. He refused to acknowledge Henock Beamare as his father-in-law. Instead, he referred to him as his father-out-law.

Source: wiktionary

In the absence of the father in his role as father-in-law to Malone, the would be son-in-law comes under the direction of another father figure, the scientist Challenger, who rather than a substitute father-in-law can more pertinently be seen as a father-out-law.

Source: wiktionary

With this exit of the normal father, the would-be son-in-law ends up in the hands of a kind of father-out-law;, Challenger whose science will lead the young man to the fantasy space and the king of the ape-men.

Source: wiktionary