My fiance has a son who is 15mnths old. This is his first child and the bmothers 3rd to 3 different fathers. Her eldest lives with with his father and has no relationship with my fiance. Her middle child lived with him from the time she was 3.5 to 5. The mother encouraged her to call him daddy and said a lot of things about the bfather which turned out to be lies. They have been seperated for 12 months and the mother continues to lie to her daughter about who her father is. I was hoping for some ideas about how to go forward. should my fiance let this child call him daddy and encourage this relationship knowing it impacts on the bfathers ability to develop a relationship with his daughter. Should I encourage his son to call me mummy and not worry about any of the other stuff.