DD is 2.5, she has never met biolog father and he will not re-enter our lives. She has called step father Daddy since she was age 2 and obviously assumes he is her real father. I want her to know in the future that she has a biolog father who left when she was a week old but I don't want this to be a big chat when she is teenager,I want it to be more subtle. She has step brothers age 8 and 6 and I'm worried that at some point there will be a squable and they will say He's not really your Daddy. So I want to tell her when she is fairly young. I have heard that kids often idolise the absent parent and make up stories to themselves about how lovely they are so I want to make it clear that biolog father was an unkind person to her and that her step father is much better. I'm also concerned that in future she will say to step dad your'e not my real daddy I'm not going to bed. Anyone have any advise or experience on this? Thank you