But there's one major event that has unquestionably brought happiness back into their lives – the birth of their son Luca.
In this week's HELLO! magazine - issue number 1089 - the dance pro and his former love show off the cute tot, who arrived on August 20.
And for the first time Vincent talks about his relationship rift, which happened earlier this year when Susan moved out of their shared home in Surrey, following Vincent's fling with fellow Strictly dancer Kristina Rihanoff.
"I went off the rails, it wasn't me," says the 30-year-old dancer, who hails from Italy.
Pick up your copy of the magazine to read all about how the couple who, though no longer romantically involved, have been united in love for their new baby and are looking to the future.
And find out why they haven't completely ruled out getting back together.
Also in this week's magazine, there are exclusive pictures of Hollywood beauty Hilary Swank celebrating her 35th birthday in Tuscany.
And there's an accompanying interview in which she opens up for the first time about her incredible rise to stardom and the two men in her life – boyfriend and former agent John Campisi and his six-year-old son Sam.
Plus, don't miss our report on Gary Lineker's romantic Italian wedding with Danielle Bux, plus the pictures from Michael Jackson's funeral.
Read the full stories in this week's HELLO! magazine, on sale now.