Bruce Springsteen is so Jersey, he met his alleged mistress at a gym, where he would stand behind her on the treadmill and watch her "nicest ass" churn, according to court papers from the woman's divorce.

The "Springsteen Affair Affair" first came out a year ago, when New Jersey businessman Arthur Kelly filed divorce papers in Monmouth County naming Springsteen as the "other man." With a blanket denial from the Boss, and and no further information about the accusation, the story was dead. Until now.

The New York Post (which, to its credit, only uses two Springsteen song-title jokes) got its hands on court papers filed by Arthur Kelly during the proceedings. They detail a very Jersey romance, to say the least:

Rumors that Springsteen was stepping out with a redheaded knockout who was a dead ringer for Patti Scialfa, his wife of 18 years, began to swirl among gym rats at The Atlantic Club in 2005.

Arthur says Ann told him that Springsteen, 60, would stand at the end of her treadmill as she ran. It must have been a tempting vantage point for the "Thunder Road" singer because he once told Ann she had the "nicest ass" in the gym, Arthur says.

What could be more New Jersey than meeting at a gym? The Situation would be proud. Of course, it wasn't all high-intensity, low-rep romance:

Workouts spilled into lunches at a nearby cafe, with Ann's two daughters sometimes tagging along. The children got to know Springsteen so well that they called him "Bruce," according to court records.

The wide-ranging chats Ann had with Springsteen got into politics. When the blue-collar hero and liberal icon learned that Ann was conservative, he gave her two books to read.

But was it love, or was Springsteen just blinded by the light of Kelly's "Botox, anti-aging laser treatments, [and] breast implants"? Arthur Kelly seems to think it was the real deal:

Springsteen seemed smitten—Arthur alleges in court papers that The Boss told Ann that he thought about her while he was on tour.

There were other signs, Arthur says. In 2007 and 2008, unsigned Valentine's Day cards without stamps or postmarks showed up in the Kellys' mailbox in West Long Branch.

Springsteen personally gave Ann front-row tickets to concert rehearsals on Sept. 24 and 25, 2007, for his "Magic Tour" shows at the Convention Hall in Asbury Park. Ann was so floored by The Boss' crooning, she allegedly told Arthur's mother, "It felt like Bruce Springsteen was singing to me."

The Boss' camp refused to comment on the Post's story, but they were able to get a quote from a "friend," who oddly enough talks kind of like a publicist: "Bruce and Patti continue to have a terrific marriage and are very devoted to each other and their children" [NYP, image via Getty]