Washington, Jul 9 : American actress and former Playboy model Shauna Sand has been revealed to have cheated on her ex-husband and soap opera star, Lorenzo Lamas, with his then-18-year-old son, A. J. Lamas.

Lamas, 51, had at the time thought it was all motherly love on Sand's part, and did not realise what was going on.

"He thought Shauna was acting like a mom to A. J. He had no clue that she was his son's lover!" Fox News quoted a friend of Lamas as telling Star Magazine.

The Bold and The Beautiful star filed for divorce in 2002, months after the romance between Sand and his son reportedly heated up. (ANI)