Nikki Bella felt like she had "a huge piece" missing when she split from John Cena.

John Cena and Nikki Bella

John Cena and Nikki Bella

The 'Total Divas' star admits it was tough when the couple - who have since called off their engagement - decided to go their separate ways as it was like they were married anyway.

Nikki said: "I feel such a huge piece is just missing from me. It was just weird. First morning in six years not to talk to him, you know?"

And her sister Brie added: "I mean, you guys were like married ... I just don't want him to be lonely. And I don't want him to regret not being a dad. And that's what makes me sad 'cause John feels like a brother and I hate thinking in my head that he's gonna be alone.

"You and I are such hard workers and there's times there's been zero payoff, but when you have a baby, even if Birdie wakes me up five times in one night, the way she holds me, the way she smells, it's like, you don't care. I want you to feel that."

John - who has previously insisted he does not want children in the future - fully supports Nikki's decision to have a family one day but she wanted him to father her children.

Speaking in the preview clip for their show 'Total Bellas', she said: "He told me, he sent me this text last night and he goes, 'The day you become a mom and look at your baby, I'm expecting to get the first thank you text.' But it's like, I wanted him to be the father of my kids."