"The monks placed a curse on the family ever since saying they will never have a happy marriage, they will always have trouble producing legitimate heirs," Lacey said. "And there'll be other tragedies and look what's happened."
In Prince Albert's family history, his mother, U.S.-born Princess Grace, endured husband Prince Rainier's philandering and then died in a car crash.
Princess Grace's eldest child, and Albert's sister, Princess Caroline, saw the father of her children killed in a speedboat accident.
There was a time when no one in Monaco imagined a royal wedding involving their prince would ever really happen.
In his bachelor days, it seemed nothing could pressure Prince Albert to tie the knot. In 2006, he told ABC's Ron Claiborne that he had no plans to marry in the "near or distant future."
"The wedding must be a relief to Monegasques," Catherine Ostler, a contributing editor to the Daily Mail, told ABC News before the royal couple said their "I dos."
"It looked like by the time a man gets to 53 you start wondering if it's ever going to happen," she added.
In addition to the infidelity questions surrounding her husband, Wittstock was also said to have been overwhelmed by preparations for the wedding, lonely because of her lack of friends in Monaco and frustrated by her failure to speak French, the official language of the tiny but wealthy European nation.
Wittstock competed in the 2000 Olympics for South Africa. She was born in Rhodesia (now Zimbabwe) to working-class parents: her father, Michael, is a sales manager and her mother, Lynette, a retired swim coach.