Louis was just the tonic Kate needed after her painful split from Sam and they had a wonderful time," a friend tells the UK publication. "However, they have realized their relationship isn't workingand Kate needs space to be on her own. She is very grateful to Louis for helping her pick her life back up after her marriage ended and they had a lot of fun together, but she felt it had come to an end and wants to concentrate on her career and children."

Kate, 35, is mother to 10-year-old daughter Mia, from her marriage to filmmaker Jim Threapleton, and Joe, six, from her union with Mendes. Friends add that while Dowler was an enthusiastic participant in the relationship, Kate was treading a lot more carefully. "She feels she has rushed into things and wants to be alone to find out what it is that she wants," explains a pal of her relationship with the model.

Kate's first love was fellow actor Stephen Tredre. They were together for five years, but Tredre tragically died of bone cancer, just as the actress was preparing to taste worldwide fame with the release of her acclaimed movieTitanic. She later enjoyed a brief three-month romance with Rufus Sewell, before embarking on her marriages (her first lasting three years, and her second ending after seven years).