Jennifer Aniston, Justin Theroux in Nasty Love Triangle 1Jennifer Aniston has been there; now she’s accused of going there. Heidi Bivens , the long-time partner of Jen’s rumored new boyfriend Justin Theroux charges that Aniston is a homewrecker.

Bivens said she only moved out of her home with Theroux only last week. Aniston, she said, moved in on her partner of 14-years just like Angelina Jolie did with Brad Pitt — way to close to the end of her relationship for comfort.

Bivens, a Hollywood costume designer, is devastated, according to a rep.

“Heidi and Justin have been together for 14 years,” a rep told The New York Post.

“They met when she was 20 years old and he 24, and yes, she just moved out of their home last weekend. She has no comment,” the rep added.

Aniston and Theroux appeared together last week at the MTV Movie Awards and were spotted afterward, getting cozy at a Soho House after-party in Hollywood.

Jen introduced Theroux to close friends Chelsea Handler and Courteney Cox on May 27 to introduce him, according to People.

At the time, Bivens was still desperately trying to keep her relationship going.

But a Theroux rep said the relationship was “over between him and Heidi before he got close to Jen.”

Aniston was unquestionably upset about Jolie and Pitt uniting so close to the end of her five-year marriage to Pitt.

In one of her few public comments on the matter she called Jolie “uncool” for moving in on Pitt so close to, if not before, the end of her marriage.

“There was stuff printed there that was definitely from a time when I was unaware that it was happening,” Jen told Vogue magazine when her marriage fell apart.

“I felt those details were a little inappropriate to discuss. That stuff about how she couldn’t wait to get to work every day? That was really uncool.”

Jennifer is currently starring “Horrible Bosses.” She plays a sex-crazed dentist with predatory sexual habits.

Maybe the part went to Jen’s head.