Raunchy rapper Eminem and his ex-wife, Kim -- whom he's sung about killing -- are a duet again, according to the singer's grandmother.

Betty Kresin told The New York Post from her home in Missouri that Kim has moved back into the controversial singer's mansion in suburban Detroit.

"They're back together," Kresin said, "and I think Marshall [Eminem's real name] is very happy about it.

"He loves Kim and Hailie [their daughter], and Kim is the mother of his child. Marshall is a terrific father and very family-oriented. I'm not surprised he'd want that stability."

Since Eminem's split with Kim, he has been romantically linked to a number of stars, including singer Mariah Carey.

The divorced duo had been sharing custody of 6-year-old Hailie Jade since their 2000 marriage meltdown.

The high-school sweethearts were wed in 1999, but the marriage was a time bomb. The final straw was reportedly Kim's suicide attempt at their home.

Eminem also allegedly assaulted a friend of his wife's outside a Michigan club during a jealousy-fueled parking-lot spat.

The charges were dropped, but Kim retaliated by suing him for emotional duress, citing his venom-laced lyrics suggesting that he wanted to kill her.

His grandmother hopes those days are in the past.

"I want him to enjoy his life," Kresin said of her famous grandson. "Everybody deserves a piece of the pie."

The couple might have reconnected sooner, if it hadn't been for Kim having a baby five months ago with another man. Oh, and there's that tattoo Eminem has that says, "Kim: Rot in Pieces."

And he won't be able to wipe out his song catalog, which includes such lurid lyrics as "Dada made a nice bed for Mommy at the bottom of the lake."

While Kresin called Eminem a "devoted father and grandson," she had bitter words for the rapper's estranged mom, Debbie Mathers-Briggs, her own daughter.

"I just wish she would go on television and say to her son, ‘Marshall, I'm on TV to tell you I was not a good mother. I know I wasn't good to you,'" Kresin said.

Eminem never misses an opportunity to discuss his harrowing childhood. In the past, he has lambasted his mom as abusive and neglectful.

She has always denied his charges and has sued him for defamation.

Kresin said she plans to write her own life story to help fans understand Eminem's background and the obstacles he overcame to become one of the world's biggest superstars

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