From The Boston Herald:

During Beyonce and Jay Z's U.S. On the Run tour, the crew was never quite sure which Mrs. Carter would show up to work: the Beyonce who would playfully banter with her husband or the superstar who had no interest in him.

"Sometimes Beyonce seemed so angry with Jay," says a mainstay backstage. "She would ignore him or pointedly not laugh at his jokes. Or she just walked off stage without him." Then the pendulum swung again, says the source, and Jay seemed to be back in Queen B's good graces. "She would be loving, affectionate and all over him for a couple of days."

She's not playing mind games. Friends say the normally controlled singer is struggling as she decides whether she should keep fighting for her six-year marriage. Since May 12, when footage leaked of a brutal elevator showdown between Jay Z, 44, and his sister-in-law, Solange Knowles, after the May 5 Met Ball - a fight, sources say, over accusations of his infidelity - the stars' union has been in a free fall.

"Beyonce always ignored the cheating talk, but after the fight, the floodgate of rumors opened," says the confidant. "She doesn't know what to do." Multiple sources say the singer plans to split after their tour officially wraps in September. And one insider tells Us the parents of Blue, 2, even have a draft of a divorce announcement ready for the Associated Press - if she decides to call it quits. "Beyonce has been going back and forth all tour," says the source.

"It's really sad. It looked like she was fighting so hard to keep the family together. And it just wasn't working." A mutual pal says the indecision is torture for the 32-year-old. "Beyonce is caught up because she truly loves him," says the pal. "She doesn't know what the next step should be."

Her Escape Plan

Leave it to Beyonce, a woman who keeps a temperature-controlled digital archive of all of her performances, to have a meticulous plan of action in place just in case. Step one: securing a place to live. "She's been looking for a new home ever since the Met Ball incident," says a source. "Like, literally that week." In early June, the "Drunk in Love" diva checked out a $21.5 million penthouse palace in NYC's Chelsea neighborhood, the same area of Katie Holmes' quietly chosen postsplit bachelorette pad. "She was by herself, with no Jay Z in sight," says a source. The two-floor unit is half the size of Jay Z's Tribeca apartment, which he bought as a bachelor in 2004, but still boasts 4,000 square feet of room for her and Blue. Beyonce's office, a.k.a. her BeyHive, is based in Manhattan, and potential divorce proceedings will be based there. "She'll file for divorce in New York," says an insider. "Lawyers are already involved." (The insider, however, laughs off a report that divorce proceedings are already so far along that a marriage legal team joined the tour: "They weren't at the show unless they bought tickets for fun!")

Just as important as nailing the location was finding a mentor in the art of amicable separation.

For that, Beyonce turned to none other than "conscious uncoupling" guru Gwyneth Paltrow, one of the few celeb guests at her 2008 wedding. Beyonce crashed at Paltrow's L.A. mansion in early August.

"She's a great friend on every level," Beyonce gushed of her BFF last year. Her other trusted adviser, as always, is her mother, Tina Knowles. The House of Dereon matriarch had been urging her to reconcile with Jay Z, says a source, "but if the choice came down to splitting, she'd support her."

Amid the planning, she has been securing a brief break from the family business. The singer is setting up a period in late fall when she and Blue can disappear from the public eye. An industry honcho, in fact, was recently given a courtesy heads-up that the megastar would not be available later in the year. Indeed, she has no engagements scheduled after her tour wraps on September 12 and 13 in Paris. (The shows are being taped for a September 20 HBO special.) As for the chatter that the drama was created by two consummate professionals simply drumming up interest in their tour, a friend slams the reports: "There are a million things they would do before putting the issues of their marriage in the spotlight." The tour's end will be a relief, says the insider: "It was stupid they went through with this when there were problems, but they were already in too deep. They will finish the dates, but then she is done."