Maks Chmerkovskiy shocked fans by skipping out on his Dancing With The Stars performance last night due to “personal issues” — but Star has the true story behind his puzzling absence.

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 says “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 RADARONLNE.COM last month. “She acts like she is this huge celebrity, and is really just a big diva!”

Another insider told Radar 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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The post Vanessa Lachey’s Causing DWTS Drama With ‘Difficult’ Behavior And Demands! appeared first on Star Magazine.