For more than three decades, Dan Trimble thought he had a picture-perfect marriage. He and his wife, Grada, had two daughters and what he considered a life of adventure.
While it may sound like hyperbole, experts say divorce can become "contagious" in close social groups.
"Think of this 'idea' of getting divorced, this 'option' of getting divorced like a virus, because it spreads more or less the same way," University of California, San Diego professor James Fowler told "Good Morning America."
"When one person experiences divorce, it gives the people around them information about what that's like," he said.
According to new research done by Fowler, along with professors Nicholas Christakis and Rose McDermott, being friends with someone who gets divorced makes someone 147 percent more likely to get divorced themselves. A person who has a sibling who gets divorced is 22 percent more likely to also split from his spouse, the researchers say.
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Fowler said someone does not necessarily have to get divorced himself to change the way divorce is viewed in a social group.
"You might have a friend, for example, who gets divorced, and that changes your mind about whether or not this is an appropriate option. And then you go and talk to a different friend about whether or not they should get divorced. And so one person's divorce can travel through the network even though the person in the middle isn't really affected," Fowler said.
"The 32 years we were married, for the most part, were very good years," Trimble told "Good Morning America." "We had a lot of memories. I was active duty Air Force. We were traveling all over the world."
In the final years of his marriage, Trimble said, he and his wife had begun to grow apart. Trimble says at the time he did not realize that he and his wife were developing separate interests.
Then, two years ago, his daughter, Alycia Sheley, and his grandchildren, moved in with Trimble and his wife.
Sheley said she was having trouble in her marriage and decided to seek a divorce.
"In my family divorce was still a stigma; it was still a bad word. No one got divorced; you just didn't do it, no matter what was going on in your marriage you stuck it out," Sheley said. "To stand up against that ... took a lot of courage for me."
Within a few months, Sheley said, she started dating an old friend from high school. Sheley soon found happiness in the new relationship, she said, and she moved out of her parents' home. In October 2008, she married the man she began dating while living with her parents.
Trimble said seeing his daughter experience divorce and then find happiness changed his wife's perspective on their marriage. Just a month after Sheley remarried, her mother asked Trimble for a divorce of her own.
Trimble and his daughter said they believe her divorce and new life "inspired" Trimble's wife.