They are supposed to tie the knot this summer on Cape Cod.There was no immediate response from Kennedy to an email about the cheating charges that was sent to Riverkeeper, the environmental group he heads. Kirwan has a grown daughter from a previous relationship and three more with the doctor. Kennedy Jr.’s two-year marriage to actress Cheryl Hines is already on the rocks — and won’t last!That’s the claim of a Kennedy family insider, who told Radar that the bubbly That’s the claim of a Kennedy family insider, who told Radar that the bubbly Hines, 51, married Kennedy, 63, in August 2014, despite dire warnings from pals to avoid the blatant bed-hopper.The following summer they listed the compound as a summer rental at ,000 per month.The board-and-batten clad barn red farmhouse-style main house has four bedrooms and three bathrooms in 2,959-square-feet according to listing details.

and actress Cheryl Hines were married at the Kennedy family compound in Hyannis Port, Mass., on Aug. Kennedy, 60, and Hines, 48, were first introduced by comedian Larry David and began dating in 2012.

That’s eight months after Kennedy and Hines began dating — and two months after Kennedy’s troubled second wife, Mary Richardson, hanged herself in a barn.

Kirwan, 62, who is based mostly in London but also maintains a Manhattan and Norwalk, Conn.

Hines also has had a “horrible” time connecting with Kennedy’s kids Conor, 22, and Kyra, 21, the source claimed.

Their alcoholic mom, Mary, was so severely depressed she tragically hanged herself in 2012. They have held a grudge against her,” one pal of RFK Jr. In fact, Kennedy’s kids have made life difficult for their unwanted stepmom, according to the source.