TIGER STRUGGLES TO KEEP ARIZONA THREESOME UNDER WRAPS!

Tiger Woods and wife Elin are trying to repair their marriage this Valentine's Day. How long they stay together may depend on whether some skeletons out in Arizona stay buried.

With the Tiger mistress count hovering around 13 or 14, the fallen golf idol has managed to get through his sex addiction rehab without any new bimbo eruptions.

He can only hope two ladies in Phoenix hold their tongues.

Flash-back about three years ago. Tiger is in bed with these two women, enjoying the sexual equivalent of scoring a double eagle, according to a Phoenix acquaintance.

"Suddenly, he realizes that one of the girls is taking pictures or videotaping him with the other girl," says the source. "Tiger goes ballistic. He starts chasing the girl around. She runs out the door. He runs out after her. I don't know how much clothing either of them is wearing, but Tiger finally catches up with her and grabs her cell phone or camera or whatever it was that had the evidence."

Tiger wasn't thrilled by the chase, says the source, who adds that the ladies promptly went home. Days later, says the source, Tiger heard from the one he'd chased.

"She claimed she'd been injured during their scuffle," says the source. "She said she'd hired a lawyer."

Even if her charges were baseless, it would be catastrophic for Tiger if any part of the evening came to light.

According to the source, Tiger's handlers diffused the scandal by making an arrangement in which both women received regular payments, so long as they kept quiet.

Tiger's agent, Mark Steinberg, did not respond to detailed questions.

You have to figure Tiger made the Arizona ladies fork over all their pictures. But could one of the ladies be the woman who offered Vivid Video that purported sex tape, or Playgirl magazine those purported nude photos?

In December, Tiger's lawyers won an order in London blocking the publication of any Tiger porn -- nonsensically cautioning that we shouldn't assume "such photographs exist."

If the ladies' lips were duct-taped with dollars, it seems to be holding -- at least for Valentine's Day.