The actor and musician first met in 2005, tying the knot the following year. They share two daughters, ages 17 and 14.
“She didn’t want this,” the source added of Nicole. “She has been fighting to save the marriage.”
Back in June, they were photographed together at the FIFA Club World Cup. A few days later, Nicole shared an image of the pair embracing on her Instagram, writing, “Happy Anniversary Baby.”
In July, Keith exited a radio interview after being asked about his wife doing “love scenes” with younger men.
BuzzFeed has reached out to representatives for Nicole and Keith for comment.