Credit: Steve Granitz/

Affair in the air?

Jennifer Lopez and Marc Anthony announced their surprising split last Friday, but the duo came close to parting ways two years ago because of Anthony's fling with a flight attendant.

In the new Us Weekly, out now, a source says that Anthony, 42, hooked up with a flight attendant he met aboard a private plane in 2009.

"Marc and Jennifer almost split up over it," the source tells Us of the couple, parents to 3-year-old twins Emme and Max.

Seconds another insider: "Jennifer was going to leave him then, but Marc begged her to stay. They went to marriage counseling and she decided to give it another shot. He was someone she truly loved."

Although Anthony and the American Idol judge, 41, weathered the storm of infidelity, his raging jealousy over Lopez's successful career continued to drive a wedge between them. Anthony's controlling behavior over his wife's wardrobe and business endeavors -- and his own unfounded paranoia about her and other men-- also factored in to their major decision to end their seven year marriage.

For much more on the shocking split -- what's at stake, their money squabbles, who will get  Max and Emme and whether she's ready to date again -- pick up the new Us Weekly, out now.