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Jennifer Aniston and John Mayer's rocky romance reportedly turned sour after their New Year trip to Mexico.
Reports that all is not well in Johnnifer-land just keep on coming and the latest claims the couple have cooled their affair after John spent almost all of their holiday partying hard with his brothers and failing to mingle with Jen's friends.
"Jen was distressed for most of her time in Mexico because John was more interested in hanging out with his brothers Carl and Ben than with her," a source tells Now magazine.
"At first, she was happy for him to invite them because her friends, including Courteney Cox and Sheryl Crow, were coming along and she thought: 'The more the merrier.'
"But once it became apparent that John wanted it to be a boys’ holiday and she was secondary, she got very upset."
The source adds, "She couldn’t believe that he chose to spend most nights in the villas Carl and Ben rented elsewhere in the resort, leaving her on her own.
"She was really embarrassed because he made no effort to keep up appearances for the sake of her friends."
This story follows hot on the heels of reports the couple are fighting over the prenuptial agreement for their 'upcoming' wedding.
See Jen and John making a quick getaway in the New York snow
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