Nikki Bella Reveals 'Lonely' Life Engaged to John Cena in Telling 'Total Bellas' Sneak Peek

The WWE Diva clues fans into the difficulties of her relationship with Cena in a new clip from the upcoming season of "Total Bellas," which returns to E! this Sunday.

"What's hard at times, what people don't realize about my relationship is I'm alone a lot," Nikki tells the camera in a confessional. "And I'm alone in these big beautiful homes which you're like, 'Gosh, these homes are unreal.' But to be honest, since we've gotten engaged, John and I have probably shared our bed together maybe 30 days total out of like six months. Or 40 days."

"So hearing Brie and Lauren and JJ and Bryan all talk about their family stuff and their kids, it makes it like just sink in a little bit more of how lonely it will be and how lonely it gets."

The WWE stars began dating in 2012 and were engaged in 2017. But after a year of engagement, the couple announced their split on April 15.

It has been a month since the separation. Neither party has revealed why they decided to call it quits, however, Cena did strongly suggest on the "Today" show Monday that it was his former fiancée that pulled the trigger.

"I had my heart broken out of nowhere -- or for me, it was out of nowhere," he said before emphasizing he "still would love to marry Nicole" and start a family with her, despite speculation Cena's hesitancy to have children is what caused the rift in their relationship.

"There was an unfortunate set of circumstances where our relationship ended," Cena added on the NBC morning show. He further placed the ball in Nikki's court with this comment: "I don't want anybody else -- I love Nicole. And I'm really trying to support her in finding whatever it is that she wants that made this fall apart in the first place. I don't have any other hopes other than that maybe one day we can work it out."

it has to yet to be confirmed what officially caused their split. From the clips of the "Total Bellas" new season that have been released so far, it seems that Cena not wanting children was a big issue, in addition to Nikki being alone a lot in their home and having to make a lot of sacrifices for John.

"Total Bellas" Season 3 premieres Sunday, May 20 at 9 p.m. on E!