How John Cena's graphic sex scenes ruined relationship with Nikki Bella

John Cena and Nikki Bella. Photo / Getty Images

John Cena's ex-fiancee was not a fan of the actor's graphic sex scene in Amy Schumer's movie, Trainwreck.

Nikki Bella, who split from Cena in April after six years together, revealed on the latest episode of reality show Total Bellas that the sex scene damaged her relationship with the wrestling superstar.

"Imagine watching your man do a sex scene and have the whole world see his big butt," she said.

"You know you get visuals. I swear, I couldn't masturbate forever because I just think of the sex scene."

In an interview with Conan O'Brien in 2015 to promote Trainwreck, Cena admitted that his girlfriend wasn't impressed when he told her he was appearing nude in the film.

"I didn't think I'd get the part, and I kept putting it off and not telling Nicole and not having the discussion of, 'Hey, there may be some graphic scenes,'" Cena said.

"So I got it [the role] and I couldn't say no. So I kinda walked in one day and just said, 'Hey, I'm doing this!' And that was the wrong approach.

"She has such beautiful brown eyes and they glowed with red hell fire and she has such a great smile but she turned into the Alien and Predator all at once."

Cena and Bella are now just friends but Bella, who is a wrestler and reality star, said in a recent vlog post that there's still hope for them.

"We talk every day," she said. "He is not only my best friend, but he truly is one of the most amazing people I have ever met. I do have hope for us."

The pair have already been spotted back together since and there are reports they are "officially" back together.