According to a show insider, the pro's celebrity partner Vanessa Lachey, 36, is so "difficult" to work with, the pro refused to dance with her!
"Vanessa is the boss and likes submissive men that do what she tells them to do," a source exclusively told RadarOnline.com. "She wants to choreograph her own dances, select her own music and even design her own costumes."
Chmerkovskiy, 37, is so furious with Lachey's belittling behavior, he may never come back to work!
"Vanessa thinks she's the pro and the star and doesn't want a partner – she wants an employee who does what she says," the source added. "Maks is done with her and might not return to the ballroom."
"Vanessa's ego is just through the roof," an on-set source told RadarOnline.com last month. "She acts like she is this huge celebrity, and is really just a big diva!"
Another insider told RadarOnline.com she was jealous over her husband and competitor Nick Lachey's close moves with gorgeous partner Peta Murgatroyd, 31.
"Her issues are starting to affect everyone," the insider said. "Everyone is just hoping she gets eliminated soon!"
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