She says it is especially important to respect the child's relationship with the other parent.
Moving into the role of the child's parent too quickly or pressuring them to refer to you as "Mum" or "Dad" when they already have a parent can create serious problems for everyone.
Simone's more low-key partner, Toby Roberts hits the right note - acknowledging it can be awkward for all sides when a new partner comes on to the scene.
Roberts says Warne had been initially uncomfortable when he became the new man in Simone and the children's lives.
"I'll never be the children's father, and I'm not trying to be. I have a lot of fun with them and if I can be a positive role model then that's a good thing", is the way he looks at it.
Source: Herald Sun