Kendra’s getting way to close to her ‘Playboy’ Playmate bestie Jess — and Hank is NOT happy that Kendra can’t keep her partying under control!

Are Kendra Wilkinson and Hank Baskett heading towards splitsville? Another woman is supposedly involved in the downward spiral of this already shaky marriage. On March 26, Kendra flew off to Las Vegas with her girlfriend, Playboy Playmate Jessica Hall — and the two reportedly were spotted making out at the MGM Grand’s Wet Republic!

Between the intense tongue-sucking session and endless Jameson shots, onlookers say the girls seemed deeply enjoyed each other’s company. “After a bunch of drinks, Kendra and Jessica really started getting crazy,” a source tells In Touch. She “looked thrilled to be letting loose without her man in town.”

Kendra’s wild-girl vacation didn’t settle well with Hank — as he has been trying to get Kendra to calm her partying ways. “He hadn’t wanted it to be a girls’ trip,” a source explains.

Could his anger be the reason that Hank skipped out on Kendra’s super-important Dancing With The Stars results show on March 29?

A few weeks prior to the vaca, Hank decided to escort Kendra for a night out on the town with her girlfriends. But the night was a disaster — they fought the entire time!

“She excused herself mid-argument and spent a long time in the bathroom with her girlfriend,” says the source.

“They were arguing a lot right before DWTS started,” adds another source. “Kendra wanted to spend more time with friends. But Hank thought she should be with him and Hank Jr.”

“They just keep dragging on the misery,” notes the insider. “Sometimes, it seems like it would be best to end it.”

And Jessica’s involvement isn’t helping the marriage. Unlike Hank, Jessica — who is signed on to play a key role in the upcoming season of Kendra — has shown nothing but to support to Kendra. Jess has been at many of the DWTS tapings and has even gotten close with Kendra’s family — she’s having Kendra’s brother guest-star on her radio show.

BFFs — could Jessica’s support be what Kendra’s looking for? Do you think she’s going to kick Hank out the door soon and move on with her girlfriend?

- Lindsey DiMattina

Do You Love Kendra’s DWTS Look?

Kendra Practices Sexy Moves On Hank!

Kendra And Hank Need Date Nights!