More trouble in eyeliner paradise for Ashlee Simpson and Pete Wentz. Just as she showed off baby Bronx on Twitter, Pete was partying with strippers, Playboy bunnies and assorted fun-loving people in Las Vegas. He and the other partygoers were boozing it up and going crazy. At various points, “people were even drunkenly playing makeshift Slip ‘n’ Slide with a mat and lubricant” and Pete was “dancing on a pool table with the girls.” Jesus, that sounds like a really fun party.

Ashlee Simpson is a proud mama, sharing a new photo of son Bronx on Twitter. However, she may not be so proud of her husband’s recent antics in Las Vegas!

On Tuesday, Ashlee posted a photo of her four-month-old on the micro-blogging site, saying: “I present you my little man and his adorable cheeks!” Interesting timing as Star reports in our April 20 issue — on sale today — that Pete Wentz was getting wild in Sin City with scantily clad dancers and a boozy Slip ‘n’ Slide over the weekend.

The Fall Out Boy bassist — who was without his wife of nearly one year — partied hard with about 50 band members, dancers and pals (including Girls Next Door star Holly Madison) following a sold-out show at the Palms Casino and Resort on April 5.

“Everybody was going absolutely crazy,” an eyewitness tells Star. “People were even drunkenly playing makeshift Slip ‘n’ Slide with a mat and lubricant. And Pete was in great spirits. He was dancing and singing along to his band’s own songs, grinding up against the dancers.”

At one point he was “dancing on a pool table with the girls,” the partygoer adds.

However, earlier in the day, Ashlee — who headed back home after attending FOB’s April 4 concert in Irvine, Calif. — Twittered: “I am beyond sad to leave my love… My heart is breaking as we drive home.” And also:”I need my hubs.”

Clearly Pete wasn’t quite as upset.

[From Star Magazine]

That’s kind of a funny image, like a movie cutaway: Ashlee crying as she watches the rain fall, it’s dark and she’s alone, twittering sadly. Cutaway: Pete doing body shots with various strippers, then declaring he was “King of the Party” while wearing a jaunty tiara. I’d feel badly for Ashlee, but from what I’ve read about Pete and their relationship together, I don’t think she really has anything to worry about. He loves her, but he also loves the occasional bitchin’ party. Live and let live.

Here’s Pete and Ashlee at the MTV Australia Awards in Sydney on March 27th. Images thanks to WENN.com .