Rachel Uchitel Having An Affair With Jeremy London?

Tiger Woods mistress Rachel Uchitel has been accused of having an affair with another married celebrity, her fellow 'Celebrity Rehab' star, Jeremy London.

London's estranged wife Melissa told friends she believes London is involved in a romantic relationship with the professional mistress.

While Jeremy London didn't confirm or deny a relationship, he said he had a strong relationship with Uchitel, who he called an "amazing, intelligent and sensitive person."

"Rachel and I are good friends PERIOD," London told RadarOnline. "Melissa is ridiculous. she has no idea what she's talking about and she's behaving like a child.

Jeremy and Melissa, who married in 2006, have had a rocky relationship. It reached its head when he was allegedly kidnapped, robbed and forced to smoke drugs during an ordeal in Palm Springs.

The pair later checked into rehabilitation together. Since completing treatment, they have separated but remained legally married.

"I'm very protective of Rachel because of our friendship," London said.

"She's been wrongfully persecuted by the media and because of what the media has done to me after I was nearly murdered, I relate to her," he said.

Uchitel has reportedly checked into a sober living facility in Malibu, Calif, to be close to London and other co-stars, who moved there once "Celebrity Rehab" finished filming.