In a revealing interview with CNN’s Larry King on Wednesday, Michael Jackson’s dermatologist, Dr. Arnie Klein, opened about the possibility that he fathered the late icon’s two oldest children, 12-year-old Prince and 11-year-old Paris Jackson.

“I think to the best of my knowledge I am not the father.” However, the doctor confirmed that he had “once donated sperm” to a sperm bank.

“It’s no one’s business,” he added.

Klein told King that he wanted the mother of the Jackson children, his former nurse, Debbie Rowe, to be involved in raising them, along with their former nanny Grace Rwaramba.