OK! Exclusive: Pam's Not Acting Like She's Pregnant

Pam enjoys a piggy-back ride from Richard Branson on Wednesday night.
(wireimage.com)

Despite rumors that an unexpected pregnancy is behind Pamela Anderson's quickie marriage to professional layabout Rick Salomon last weekend, OK! has heard that her recent behavior is saying otherwise.

Wednesday night in Las Vegas, at a party thrown by Virgin America airlines at nightclub Tryst, OK! was there as Pam and Rick showed up to the event unexpectedly. Of course, the always camera-friendly Pam was more than happy to drape herself all over Virgin honcho Sir Richard Branson for the snapping photographers while Rick headed straight to the poker tables.

And when the pair did finally meet up again at their table, Pam sipped champagne while Rick sat next to her smoking one cigarette after another.

Champagne and cigarettes? While that may sound like a good night out for some, it doesn't exactly sound like the behavior of a woman with a bun in the oven.

Only time will tell...