"decent marriage" is correct and can be used in written English.
You can use it in situations where you are referring to a marriage that is generally considered appropriate, suitable, or satisfactory by societal standards. For example, "Ben and Beth have had a decent marriage for the past 15 years."
In her mother's time, for a decent marriage prospect, young women were expected to know how to knit and cook.
Everyone's got personal experience with this issue, and I think that reading about a spouse who wants an open marriage, or has a decent marriage but is hungry for more, triggers people's own fears, or wounds of things they they've done and things that have been done to them.
"I am not naïve enough to think this class will stop you from having men over," he said as he distributed state-sponsored workbooks of what Oklahoma calls "empirically informed, empirically tested, regularly updated" information on how to make and keep a decent marriage.
Miles is so decent, their marriage is so promising and Artis is so compelling that Unremarried Widow has an unexpected effect -- it's a completely fulfilling, exhilarating reading experience.
Also, Laura has lived in an innocent place of decent, friendly, companionable marriage, sheltered from the blizzard of real things.
"What we want is not a happy marriage, but a decent divorce".
All my children had processed or were processing through university, I still played a decent game of tennis, my marriage, after a few creaks and groans and two explosive crises, was holding together, and the rumor was that I'd be a full professor within the year.
But those premises leave out other considerations that are too vague or uncomfortable to identify: "So far I'd avoided middle-class conventions like marriage and a decent-paying job," she writes.
But when pressed for evidence of my bohemian credentials, they hem and haw: Well, so far I'd avoided middle class conventions like marriage and a decent-paying job.
Andrew Sullivan, who writes for The Daily Beast, wrote on Friday that Mr. Blankenhorn was "perhaps the most clearly decent, intellectually honest, nonhomophobic opponent of marriage equality".
He applies his energies to his work and tolerates a loveless marriage to Adela, the decent daughter of well-off conservative Catholic parents and sister of a Falangist idler.
