Matthew McConaughey's mum refused to cover dad's huge manhood when he died during sex

The death of a parent is often the most difficult thing you will ever have to go through.

But for Matthew McConaughey, the passing of his father was particularly tough for an unusual reason.

The Interstellar star, 54, opened up about the turbulent relationship between his parents in his memoir Greenlights, which was published back in 2020.

Kay and James McConaughey were divorced twice and got married three times.

Describing his mum and dad 'like the Pacific Ocean in a storm', McConaughey said the tough moments were 'superseded by the love and humanity'.

Shockingly though, the actor revealed that his dad predicted that he would die while 'making love' to his wife, and that's exactly what happened.

When he died during sex, McConaughey said his mum refused to cover up his father's huge manhood.

Describing the moment in his book, he wrote: "I got a call from my mum: 'Your dad died.' My knees buckled.

Matthew McConaughey with his mother Kay McCabe and father James Donald McConaughey (Lester Cohen/WireImage)

"I couldn’t believe it. He was my dad. Nobody or nothing could kill him. Except mum.

"He’d always told me and my brothers, 'Boys, when I go, I’m gonna be makin' love to your mother.' And that’s what happened. He had a heart attack when he climaxed."

Although this is pretty explicit in itself, it turns out there's more to the story that McConaughey decided to leave out of the book.

Instead, he spilled on the beans on an episode of the WTF with Marc Maron podcast, stating: "There’s other parts of the story that aren’t even in the book.

"I found out later that when the ambulance came to get him at the house, obviously all the neighbours came out on the street.

"And they came and told me later that my mum, in her negligee nightie that she had woke up in, wouldn’t let the paramedics cover him.

Kay McConaughey has opened up about the moment (Michael Tran/Getty Images)

"She kept ripping the sheet off going: 'Uh-uh, I want the world to see why his nickname was Big Jim, don’t you cover him!'"

Well, I guess that's one way to honour his memory - the neighbours won't be forgetting that nickname anytime soon.

Kay herself also opened up about her late husband in a 2020 episode of the Red Table Talk in which she said: "You know how he died, don't you?

"My husband died making love to me, and I remember saying when he fell back, I said, 'What's the matter, big boy? I wear you out?'

"And he's [giving] no response, no response and I'm thinking, 'Oh my god, something's wrong.'"

She continued: "I had no idea that it was too much. His heart just stopped, you know? We had a party for him, kind of a celebration of his life."