While appearing on the Arsenio Hall late night talk show recently, when asked about her relationship with John Cena, Nikki Bella noted that the two were on a break. Additionally, the Total Divas preview for the new season talks about Nikki having to adjust to life while broken up with Cena.
In both cases, this is likely a situation where WWE is playing up the Total Divas storyline, as the two were still together as recently as a few weeks ago.
Season two of Total Divas premieres this Sunday on E!.