The honeymoon is over for Robert Kennedy Jr.’s new bride Cheryl Hines – after she miffed her mother-in-law, The National ENQUIRER has learned.

Ethel Kennedy, 86, was all smiles when her son Bobby, 60, wed the “Curb Your Enthusiasm” beauty, 49,, at the family compound in Hyannis Port, Mass., in August., in AugustBut that smile has turned upside down now that the newlyweds are nesting 3,000 miles away in a home in the tony Point Dume section ofMalibu.

“Ethel had all assurances from what Bobby Jr. told her that they would settle on the East Coast and be close to her home in Hyannis,” a family friend told The ENQUIRER.

“At her age, Ethel wanted Bobby and his youngest boys, who are both teenagers, close by.“

Ethel suspects Cheryl doesn’t want her influencing Bobby, and she puts the blame for the move to California at her feet.”

Ethel was “initially very welcoming of Cheryl,” according to another friend. But the family endured a tragedy when Bobby’s estranged wife Mary – whom he was divorcing – hung herself at their family home in Bedford, N.Y., in May 2012.Meanwhile, Bobby sold his estate in Bedford, N.Y., but still has a home in Westchester County and an apartment in Manhattan.

“At her age, Ethel wanted Bobby and his youngest boys, who are both teens, close by. She believed that they would visit her on weekends,” the friend said.

But after Cheryl’s sitcom “Suburgatory” was canceled, “she told Bobby she needs to be in L.A. for the sake of her career,” said another source.

The family insider added: “Of her 11 children, Ethel is closer to Bobby than anyone, and it breaks her heart that he won’t be around much.

“Ethel felt she extended her hand in welcoming Cheryl, and it ended up getting bit.”