Poor Jennifer Aniston, just a week after she was getting married and/or having boy-toy John Mayer's baby (in OK! and Star, respectively), it turns out she and her lover are taking the fast trains to splitsville.

The trouble stems from a trip John took to Cabo San Lucas sans the former Friend. There was a hot tub, a cigar, and some non-Aniston gal pals. Jen, meanwhile tried to shop away her blues dropping $20k on furniture from the NoHo Modern, because when you can't cuddle up to a sappy singer, a $14,000 credenza is the next best thing.

Scandal seeking Star's story screams "John's Romp With Hot Tub Hottie" and claims that Mr. Mayer paid "special attention" to one young beauty in the pool and disappeared with the lass for a long walk. Jen plumped her lips in response or in an unrelated sidebar.

In Touch, on the other hand, says that while Jon and Jen are taking a break to evaluate the state of the relationship, the hot tub rub-a-dub-dubbing was all just innocent fun and the gals were actually with his band mates. One eyewitness/pool waitress says John was just "blowing off steam" and not, you know, getting blown. But sister sib Life & Style has an onlooker saying Johnny was NAKED! We had mild interest in seeing the photographic proof of this, but sadly none was offered.

OK! insists everything is puppy dogs and rainbows for Jenny A., and that she had an "Amazing Weekend" shopping and charity-ing. "She looks like a woman in love," a witness tells OK! You know, a woman in love with a man who's in a hot tub in Cabo without her.

And self-appointed weekly watchman Us can't resist the urge to point out the "Fake News" of Jen's pending love, marriage, baby carriage in last week's other glossies. Ahh, just like that tattletale baby sister you never wanted. Also, John is apparently into the kinky stuff, and a talker—ewww. And in an interesting twist, the crooner may actually be more into Jen's ex, Brad Pitt. Says one source: "He was kind of obsessed with the fact that she's Brad's ex. He wondered what was wrong with her that Brad didn't want to be with her anymore." Once again proving that their research team is the best in the biz, Us pulls a 2002 interview where John described Aniston as the hottest friend "because Brad Pitt loves her." Our advice to Jen, run now!