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The actress and fashion designer told Eve magazine that she has kept her romance close to her chest.
However, she insisted that the relationship comes second to her four children from her marriage to actor Jude Law.
It was recently rumoured that she and Law are on the verge of rekindling their romance after they were spotted looking close on holiday.
Frost, 43, has dated musician Jackson Scott and TV presenter Alex Zane, both almost 20 years her junior, since divorcing Law in 2003.
> Frost's fashion firm 'in administration'
