Hulk Hogan has devastated wife Linda and their children by cheating on his spouse with one of daughter Brooke’s closest friends, The ENQUIRER has learned exclusively.

And the blockbuster development threatens to further inflame the already explosive divorce battle between the wrestling superstar and his wife of 24 years.

Hulk’s extramarital relationship with 33-year-old Christiane Plante was common knowledge among some of the crew of his reality series Hogan Knows Best — but Linda, Brooke and son Nick were all completely oblivious, say sources.

And when The ENQUIRER questioned the Hulkster’s mistress at her Miami Beach apartment — where pals say Hulk picks up the tab — Christiane broke into tears and confessed to the affair that has shredded the Hogan family.

“I’m terribly sorry for what occurred,” Christiane Plante told The ENQUIRER.

In an exclusive interview, Christiane apologized for hurting Hulk’s wife and daughter. The ENQUIRER also discovered that she wrote an apology letter to Brooke Hogan, her former best friend.

“It was never my intention to hurt Terry’s and Linda’s wonderful, funny, sweet, loving, beautiful and talented daughter Brooke,” Christiane told The ENQUIRER.

“My relationship with Terry began at a time when Terry and Linda privately knew their marriage was ending. She had left him already, although no official papers had been filed.

“Terry is a good man, good father and good friend, and he and I grew close at a time when he was going through a very difficult period. It seemed right then, but I know it was wrong.

When contacted by The ENQUIRER, Hulk said: “I’ve got nothing to say. I just want to protect my family.”

Pick up this week’s issue of The ENQUIRER for more details!