Singer Seal has hit out at ex-wife Heidi Klum over reports of an affair with her minder.

The couple stated they had "grown apart" when they separated in January.

In a new interview with, Seal claims the German supermodel was cheating on him with bodyguard Martin Kristen.

"Look, boys, you know that's what happens when two people separate. They move on and that generally means other people in their lives. I certainly don't expect Heidi to all of a sudden become a nun. But as always my main priority is the emotional wellbeing of our children," he said. "To be quite honest, if there is going to be somebody else in their lives, I'd much rather it was a familiar face. I guess the only thing I would have preferred is that... Whilst I didn't expect any better from him, I would have thought Heidi would have shown a little bit more class... before deciding to fornicate with the help, as it were."

The model filed for divorce this year and was pictured last week on a beach in Sardinia with a man believed to be Kristen. She was seen topless and reclining on a sunlounger with the man looking on adoringly.

Klum massaged suncream into her tattooed companion's shoulders while they took a dip and later floated around on a lilo.

heidi seal

Heidi and Seal

But according to the website, Klum has denied cheating and claims her relationship with the guard was "strictly professional" while she was with Seal.

Heidi's friend told the publication: "It’s sad but not surprising that he [Seal] would resort to making excuses for their divorce when the real reason is looking him in the mirror."

The supermodel's rep told US Weekly: "It is sad that Seal has to resort to this kind of behavior and spread these untruths about the mother of his children."

London-born Seal proposed to the beauty in an igloo and they have three children together.

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