Jennifer Aniston and Justin Theroux are enjoying a blissful engagement and working hard to plan the perfect wedding ceremony, but Aniston is reportedly hiding some strong feelings from her fiance.

A new report claims that Aniston is having a hard time because she doesn't like hanging around the wife of Theroux's best friend. Theroux has been pals with actor Ben Stiller for a long time, but Aniston allegedly has a distaste for Stiller's wife Christine Taylor.

"It's awkward, but Jen isn't comfortable around Christine," a source said. "She can't bring herself to tell Justin because she knows it'll hurt him."

Theroux and Stiller have been friends for many years, but Aniston just can't get close to Taylor, and it's becoming an issue, the report said.

"Justin and Ben have been pals for more than 20 years, but Jen hasn't liked Christine since press reports claimed they were 'close friends' after they were seen in Hawaii together with their men," the insider said. "She wonders if Christine is using her to advance her career."

And the source added that Aniston's beef with Taylor goes a little deeper.

"Jen can't find common ground with Ben's conservative wife. Jen and Christine are just really different people," the source said. "Jen feels uncomfortable around Christine, who is quite proper, and gets along better with edgy women like Chelsea Handler."

But Gossip Cop claims the report is totally fraudulent.

Aniston and Taylor were spotted being very friendly recently when Aniston and Theroux turned up at a gala to honor Stiller, and the two women have been friends since Taylor guest starred on "Friends" early during the show's run, which was long before Aniston and Theroux ever got together.

A spokesperson for the former "Friends" star even stepped in to squash the suggestion that anything is wrong between she and Christine.

"They are great friends, have been for many years," the rep said.

Tags: Jennifer Aniston Christine Taylor Justin Theroux Ben Stiller