Imogen Thomas steps out with her two children Ariana, 8, and Siera, 5, at local park in London

Pete Bennett and Imogen Thomas embroiled in huge row following death of Nikki Grahame

Pete Bennett and Imogen Thomas in row after Nikki Grahame's death

Nikki Grahame's pal Imogen Thomas says the late star was 'never alone'