John Cena made his feelings on marriage known to girlfriend Nikki Bella on the December 2013 season 1 finale of Total Divas -- he's not having it -- and now it's up to Nikki to decide if his ultimatum is worth rearranging her life. Dead set on marriage and children, especially now that her sister Brie is engaged, Nikki can't help but fume when her previously-married man swears off another trip down the aisle -- and refuses to have children!

As this sneak peek from the March 16 Total Divas season 2 premiere shows, Nikki admits to her sister that she regrets ever broaching the subject of possible nuptials with Cena. "Nothing's worse than hearing the man you love, be like, 'I will never get married again! I will never have kids.' That stuff is tough, and that sucks," admits the WWE wrestler and model. "I know I vent to you a lot about John and I, and I have a struggle inside -- which is not your fault, I can't blame you -- but it's so hard for me right now."

Planning her own wedding while trying to console Nikki is no easy task for Brie. "This is definitely the saddest I've seen my sister in a relationship and it breaks my heart," she says.

In an especially emotional scene from Sunday's show, Nikki turns to Brie for advice, admitting that she's beginning to feel herself spiral out of control. "I'm a mess! I've never felt more confused," Nikki tells Brie. "Do I leave the man I love, or do I stay with him and just sacrifice kids and marriage? To . . . walk away from this guy because of marriage and kids doesn't seem right."

Will Nikki accept Cena's stance on marriage or move on? Find out on the season 2 premiere of Total Divas Sunday at 9 p.m. (EST) on E!