Joslyn James is claiming she has been stiffed.

Tiger's former mistress dropped into Dallas this past weekend, on the latest leg of her nationwide stripping tour.

EXCLUSIVE: The Celebrity Mistress Club's Night On The Town

But busty Joslyn -- real name Veronica Siwik-Daniels -- exclusively reveals to RadarOnline.com things didn't go according to plan.

It turns out, the porn star was stripped of her appearance fee!

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• veronica siwik-daniels

Joslyn James has gone public with the details of her affair with Tiger Woods, but one person who knows her extremely well says she doesn’t believe a word of it.

Joslyn’s sister Samantha Siwik told RadarOnline.com in an exclusive interview: “I do not believe anything she said.”

One of Joslyn’s bombshell claims is that she aborted two pregnancies and Tiger was the father. She said in a recent TV interview that she never told Tiger about the abortions.

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• Washington State Department of Social & Health Services