"It takes two to do it, but it does sometimes take one to push in to something and create a problem," she said.
Shackelford said that her husband and Lundquist met while Lundquist worked as a dean at Guilford College in Greensboro, N.C.. The college, at the time, received legal service from Allan Shackelford, who was then practicing law in North Carolina. (Shackelford's North Carolina law license since has been suspended for his failure to complete continuing legal education requirements in the state, according to the North Carolina State Bar.)
In her lawsuit, Shackelford claimed Lundquist began "deliberately to seduce" Allan Shackelford in November 2004 or earlier.
Cynthia Shackelford told ABCNews.com that at first, Allan Shackelford began giving Lundquist rides home from work. Eventually, she began noticing unexplained charges to expensive restaurants on his credit card bills and cell phone bills showing many calls to Lundquist.
When Shackelford confronted her husband about her suspicions, he would insist that Lundquist was "just a friend."
Still worried, Shackelford hired a private investigator. The investigator, she said, saw her husband and Lundquist spending time together at the Shackelfords' Greensboro home.
"It was at that point [that] I went and saw the attorney," Cynthia Shackelford said. "I said, 'This is not going to fly anymore.'"
The couple separated in 2005 and sold the five-bedroom Greensboro home. Today, Cynthia Shackelford lives with her dog in an apartment in Raleigh, N.C., and struggles to make ends meet through an hourly job at a retail store.
A former teacher, Shackelford said she gave up that career to raise the couple's two children and now, at 60, her job options are limited.
Shackelford's lawyer, William Jordan, said her husband was ordered to pay her $5,000 a month in alimony, but he has yet to do so. That may be part of the reason that the jury in last week's case, Jordan said, opted to provide his client such a large award.
But it's unclear whether Cynthia Shackelford will ever see any of the $9 million she's now owed by Lundquist. Lundquist, who did not appear at last week's trial, told The Greensboro News & Record that she plans to appeal the case.
"I'm so caught off guard by everything," she said. "I don't have a lot of money, so where this $9 million comes from is kind of hysterical."
Scant funds by alleged cheaters is one reason why many North Carolina alienation of affection claims never make it to court, Rosen said.
"They're not worth suing most of the time," he said. "For this to really work out, you've got to have a paramour [who] has substantial assets."
Cynthia Shackelford, who owes tens of thousands of dollars in legal bills, said she hopes to recover at least some money from Lundquist.
But she said she's also focused on something more intangible -- spreading awareness about the harm posed by adultery.
She said her distress over her husband's alleged affair caused her health problems, including severe weight loss. She worries about how her children, now 23 and 27, are coping with the mess.
At least one of her children, Amy Shackelford, has made her thoughts on the subject public: In a message posted on a News & Record blog, Amy Shackelford called her father a "dirtbag" and "delusional narcissist" who "emotionally and financially abandoned his entire family for the last five years."