Hilton hides new relationship from mother

Paris Hilton has not told her mother about her new relationship with Stavros Niarchos.

The hotel heiress is said to be desperate to keep her latest romance under wraps, following her split from fiance Paris Latsis.

"What relationship?" Kathy Hilton asked New magazine. "Are you sure? I don't know about that. That is news to me. I met him a few years ago, but he hasn't been at our house."

She added, "I'm so proud of Paris. People think of her as this sexy goddess but she's just a sweet girl."