Melanie, 43, was reportedly released with a caution after being questioned by officers and is said to have spent the night in custody.
A spokesman for the Metropolitan Police said today:
‘Police were called at 9.45pm last night to a residential address in Hampstead following reports of an assault.
‘A 43-year-old woman was arrested on suspicion of common assault and taken to a North London police station.
‘She has since been given a caution for common assault. The victim, a man, did not require hospital treatment.’
The lingerie model’s husband of 6 months is thought to have called the police, after a row escalated.
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The couple married following a whirlwind romance, having got engaged in August 2012.
Melanie was previously married to actor Daniel Caltagirone from 2001 until 2009, during which they had two children.