He then pledged to "write to many women who I am inappropriate with and tell them that I am making changes."
There is also an e-mail from Monica Beresford-Redman to her husband's apparent mistress, titled "Tiger Bruce Attacks Again," in which she talked about recording him in the car and called him a "liar" and "my embarrassing husband."
"I just want to expose him, so he can feel stupid," she wrote to Pierce. "That will help me? Probably not, but he has to grow up one day."
In an e-mail to Monica Beresford-Redman, Pierce apologized for the affair and offered to help her however possible.
"I apologize for my involvement in the situation, but please know I was acting out of what I believed was pure love between the two of us," Pierce wrote.
But in a subsequent e-mail, Pierce tried to cut off contact, telling Monica Beresford-Redman, "I am no longer involved in your situation and would like to be left alone. Best of luck."
The couple's two children are in Los Angeles. A judge has granted temporary custody to their father's parents, but their maternal grandparents are fighting for custody.