In her new book Spinning Plates Sophie, 42, reveals that Strictly caused problems for her and husband Richard Jones. She also likened the show to that of a “cult”.
Richard, 42, received counselling after Sophie said he was “unusually insistent knowing where I was all the time”.
Sophie and Brendan were partnered on the show in 2013, finishing in fourth place.
Brendan, 45, was axed from the show in 2018, is a contestant on the new series of Dancing On Ice.
He said: “It was an interesting read. She didn’t let on. I’m proud of Sophie for having the bravery to speak out.”
Strictly Come Dancing 2021 is on BBC One on Saturday evenings.