I think biological father is jealous and has never gotten over the ex girl fee.He wants to be in her life through this child.The step father is very wary of this ex who communicates with his wife because of the child and wants to ensure he is in full control of affairs in his house,which I think is the best thing to do.I also think this step father wants to keep things within his means and equal for all children while the biological father wants a class higher for his daughter.
What is the way out..
I dont think the law should come in.Let biological father and mum meet and discuss the issues around the matter.Let biological father lay down his demands.It is not advisable for a baby girl to be released to the father at age 10.
BTW do the two exes have other kids??
Love is beautiful and so are those who share it.With Love, Marriage is an amazing event in ones life time, the foundation of joy, happiness and success.