The day after Mary Kennedy was found hanging in her barn, her estranged husband did what his family does best: sincerely insincere damage control.

“A lot of times, I don’t know how she made it through the day,” Robert Kennedy Jr. said this week. “She was in a lot of agony for a lot of her life.”

The self-serving implication: not that he would ever know how she came to be that way.

“I remember being seated at a dinner next to Bobby around 10 years ago that she was also at,” a close friend of Mary’s told The Post last week. “It was the first time I had met either of them, and he put his hand on my thigh under the table. He was such a dog that way.”

Yesterday, the Kennedys buried Mary in Hyannisport, near the famous family compound. In life, Mary had been banned from there for years. In death, she is now the good Kennedy wife, keeping up appearances.