Michael Jackson’s future wife Debbie Rowe offered to have Michael’s baby — while the wacky singer was still married to Lisa Marie Presley!

Lisa Marie said Michael asked her to have a baby with him shortly after they married in 1994. When she refused, Michael informed her that Debbie, a medical assistant he had met at a doctor’s office, had a crush on him and wanted to give him a child.

“Debbie Rowe was offering to do it while we were married, according to him,” Lisa Marie, 35, said in an interview.

And a friend says Lisa Marie was shocked by the offer. “It freaked her out,” the insider told The ENQUIRER. “Here was her husband Michael saying, ‘Well, if you won’t give me a baby, I’ll just get this other woman to give me one.’

“He obviously didn’t see anything wrong with it. It’s no wonder Lisa left him.”

Lisa Marie divorced Michael in November 1996 and Michael immediately married Debbie. They had two children — son Prince Michael Jr., now 6, and daughter Paris, now 5.

Debbie and Michael divorced in 1999, amid reports that he’d paid her $8 million and she gave him custody of their children.

Lisa Marie had wed Michael shortly after the breakup of her marriage to musician Danny Keough, father of her two children. And she now says her quickie marriage to the “Thriller” singer was stupid.

“He’s not sexually seductive, but there is something riveting about him,” Lisa Marie said. “I got caught up and I thought I was in love with the man.

“Michael was like the Wizard of Oz. He’s mysterious, he’s fascinating, he’s bigger than life. But at some point, it turned on him and he became this freak.”

When Michael married Lisa Marie, there was speculation that he’d tied the knot to deflect attention from allegations that he had sexually molested a 13-year-old boy — a charge that was never prosecuted.

“I’m not going to say he did or didn’t,” Lisa Marie said. “There are things that don’t look good, that’s all I can say. And most people saw it at the time, except me.”