EXCLUSIVE PHOTOS - Kris Humphries Flirts With Mystery Girl At Miami Nightclub

While Kim is away, Kris Humphries plays!

As wifey Kim Kardashian was off in New York taping her reality show with sis Kourtney, new hubby Kris was in Miami taking in the local sights and enjoying the local flavor ...

The NBA star partied at the Fontainebleau's Liv nightclub September 30 and cozied up to a particular brunette on that fateful Friday night. A source inside the club that evening tells us:

"Kris was eating up the attention. All these girls were coming up to him and trying to flirt and he loved it, but he was really into this one chick. He kept leaning into her, talking in her ear. She took out her cell phone and was typing into it -- I think she got his number."

As the night progressed, it was unclear whether the two left together but Kim wasn't waiting for Kris at home -- she was off in New York, taping Kim and Kourtney Take New York. Since Kim left Kris solo, did the 26-year-old basketball hunk indulge?

"Kris is so young -- he's just doing what any guy his age does; it's just most guys his age aren't married. He's a professional basketball player and he's used to having access to whatever he wants. How's he gonna say no?" our source said.

Eeesh ... could Kim and Kris really be headed for Splitsville just two months after tying he knot???