“Jennifer found out that Chelsea was spilling secrets about her marriage, and talking behind her back,” a source close to the 42-year-old Chelsea star said.
Mutual friends are in "shock" over the betrayal, a source claimed.
“Everyone is surprised over this because they were such close friends, but Jen knew that it had to be someone really close to her that was talking — and found out it was Chelsea!”
Though Aniston seems like everyone's best friend, she can turn nasty, the source added.
According to the insider, “When Jennifer found out, she flipped!”
As Radar previously reported, the 48-year-old former Friends star even ordered her longtime publicist, Stephen Huvane, to drop Handler after the feud.
“Stephen dumped Chelsea after she had a huge blow-up with Jennifer, who is one of his very top-priority clients. He’s no longer representing Chelsea,” a source added.
Aniston and Handler have not been photographed together in public since January 2015.
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