Nick Viall’s ‘DWTS’ Nightmare: ‘No One Can Stomach’ Vanessa Grimaldi On Set!

While Nick has become a front-runner on DWTS (despite having two low scoring weeks, rumored to have been caused by Vanessa’s jealousy about Nick’s fame) his fiancée has become “the most hated hanger-on in show history,” according to .

Despite being a part of Nick’s high-scoring performance, on Monday night -- the newly engaged couple had quite the steamy make-out sesh at the end of the former Bachelor’s racy rumba -- a source told Radar that Vanessa wasn’t even supposed to attend the show's rehearsal, earlier that day, to practice her role in the dance.

“Nick was instructed not to bring her, but she refused to listen,” the insider said. “She is so insecure that she feels like she needs to be there to monitor him, and it is starting to cause a lot of issues between Nick and his dancing partner, Peta Murgatroyd,”