Jennifer Aniston And Justin Theroux's Marriage Over After Secret Phone Calls Discovered?

(Photo : Getty Images/Dimitrios Kambouris) Jennifer Aniston and husband Justin Theroux

Jennifer Aniston recently discovered that husband Justin Theroux has been making secret phone calls to his ex-girlfriend, costume designer Heidi Bivens, sources say.

"For months, Jen has been suspicious that Justin was communicating with Heidi," an insider told RadarOnline.

After Aniston recently "busted her husband when an unfamiliar New York number called his cell phone," she "confronted Justin," continued the source. "She broke down in tears and demanded that he cut off communication with Heidi immediately. Justin tried to apologize and made a few lame excuses about he and Heidi having mutual friends."

"This is the ultimate betrayal for Jen and her absolute worst nightmare," added the insider.

For Aniston and Theroux, adoption, now, is off the table.

"She and Justin were halfway through the process of adopting twins -- a boy and a girl -- and were hoping to bring the kids home in the next couple of months, but their plans came to a halt when they started having problems," a pal told In Touch (via RadarOnline). "She'd even built a nursery in her Bel Air home."

"They've been married for barely seven months -- and it's already over," said the friend. "It's heartbreaking."

According to the pal, "Justin is apathetic when it comes to marriage," and "Jen's starting to realize that, too."

"They remain at complete odds over everything, from how much time they spend together to where they should live," the friend said. "She loves LA, he'll take Manhattan."

Adding insult to injury, Aniston was recently forced to come to the rescue of Theroux's movie career.

"Justin's putting a light-hearted front on things right now, but he's absolutely devastated at his string of movie flops -- 'Zoolander 2' 'Rock of Ages,' 'Wanderust' -- and has no choice but to rely on Jen to help him out," a source told OK! magazine.

The source added, "It's bad for her image to have a loser husband and she wants him to have a big hit under his belt."