Wiktionary
n. A man or woman who gains the affections of someone already married and is blamed for a dissolution of the family.
Wikipedia
"Home Wrecker" is the seventeenth episode of the seventh season American Dad!. It aired on Fox in the United States on May 8, 2011. This episode mainly centers around the couple of Stan and Francine, whom become divided over the architectural style wanted for the renovation of their kitchen. Greg and Terry, the Smiths' gay neighbors, intervene in the situation. Greg and Terry criticize the strength of Stan and Francine's marriage, much to their frustration. A bet is made in regard to the Smiths' rocky relationship: if Terry and Greg were to win the bet, they would receive the marriage license of Stan and Francine. Meanwhile, Steve, his friends, and Principal Lewis take advantage of Barry's proficient ability to count cards; however things become awry when they try to remove Lewis of his cut.
This episode was written by Alan Freedland and Alan R. Cohen, and directed by Joe Daniello. It was met with mixed reception from television critics, who went on to criticize the episode's humor. During its initial airing, the episode was viewed by 3.29 million households and achieved a 1.6 rating in the 18-49 demographic, according to the Nielsen ratings. It featured a guest appearance from Maurice LaMarche, as well as several recurring voice actors and actresses for the series.
Usage examples of "home wrecker".
She was not a home wrecker, and would not under any circumstances get involved with any kind of married man--not even one as charming and handsome as Carey Grant, let alone one who was uncouth.