Bosses of the BBC One dancing show are said to be worried men find 36-year-old Kristina 'irresistible.
This comes after rugby star Ben Cohen, Kristina's partner on the show last year, recently announced his split from his wife of 11 years.
Her other partners have included Joe Calzaghe and Vincent Simone, both of whom split from their partners shortly after competing on the show. This year she is partnered with Blue singer Simon Webbe.
A source told a British newspaper: "There were discussions about Kristina, and she was made aware of them herself. There is no blame being attached to anyone.
"Most of the relationships that have broken down after contestants appeared on Strictly Come Dancing clearly had problems before the show began.
"But there is no doubting the fact that Kristina is a very attractive woman who has been at the centre of relationship breakdowns."
Ben Cohen's wife Abby's mum recently revealed she is not happy about his friendship with Kristina.
She told the Mirror: "When I saw the photo of him with his arm around Kristina, I was so angry. I sent an email to his phone.
"I feel so sad for Abigail. She loves Ben. Abby is my daughter and I would never have wanted her marriage to end like this."