Actress Natalie Wood’s sister, Lana Wood, has revealed that a gay affair was the reason for Natalie and Robert Wagner’s divorce in 1962.

Lana stated that Natalie caught Wagner in the arms of another man in June 1961.

Lana disclosed this information on the Fatal Voyage: The Mysterious Death of Natalie Wood podcast.

Natalie was married to Wagner twice, from 1957-1962 and from 1972 until her death in 1981.

In the podcast, Lana described her sister’s divorce, “My marriage collapsed that weekend. It’s too painful for me to recall in print the incidents that led to the final breakup.

It was more than the final straw. It was reality crushing the fragile web of romantic fantasies with sledgehammer force.”

Lana remembers when Natalie turned up at the house crying and bleeding when she was only 15.

Natalie asked her to leave the room, and it wasn’t until later that she discovered that Natalie had caught Wagner with another man.

Natalie passed away in 1981 while on Wagner’s yacht Splendour with actor Christopher Walken and Captain Dennis Davern.

Her body, clothed in sleepwear, was found in the water the next day after Mr Davern claimed she had an angry argument with Wagner.

Davern has given interviews to the media about that tragic night but admitted in a 2011 interview with NBC News’ David Gregory, “I made some terrible decisions and mistakes.

I did lie on a report several years ago.

I made mistakes by not telling the honest truth in a police report.”

He also claimed that he felt Wagner was responsible for Wood’s death.

Walken, who rarely speaks about that night, told People magazine in 1986, “I don’t know what happened … She slipped and fell in the water.

I was in bed then.

It was a terrible thing.

Look, we’re in a conversation I won’t have.

It’s a f***ing bore.”

However, in a 1997 interview with Playboy, Walken theorized how she ended up in the water, “What happened that night only she knows because she was alone.

She had gone to bed before us, and her room was at the back.

A dinghy was bouncing against the side of the boat, and I think she went out to move it.

There was a ski ramp that was partially in the water.

It was slippery — I had walked on it myself.

She had told me she couldn’t swim; in fact, they had to cut a swimming scene from (Brainstorm).

She was probably half asleep, and she was wearing a coat.”

Lana told the host of the Fatal Voyage podcast that she believes Natalie was pushed during a “horrible fight” onboard the boat.

“I think it escalated to a point where she was either struck or pushed,” she added.

“I don’t believe that it was planned.”

Wagner has co-operated with the police investigation over the years but declined to answer questions when the case was re-opened on the 30th anniversary of Natalie’s death.

Wagner has not commented on Lana Wood’s allegations of a gay love affair.