Icimoi may I also comment on what you said, (I am really not wanting to argumentative, honest)... but you said
There is an interesting point raised upthread. Would leaving this child with the adopters necessarily be in the adopters' interests?
Nothing is done here for the adoptive parents benefit, honestly it is not.
But just for a moment are you suggesting that taking their child from them would be in their best interests?
Just imagine that, a child they have loved and cared for for a long time?
If he grows up and discovers that his father and the paternal family not only wanted to care for him but were deemed perfectly capable of doing so and were in effect prevented because the adoptive parents (admittedly along with others) opposed it because they were so desperate for him to stay with them - what sort of relationship is he going to have with the adoptive parents afterwards? And what sort of damage would that do to the child?
Well of course good adoptive parents would tell a child everything in an age appropriate way all along, that is what we are all told to do, as far as I am aware. Of course not all adoptive parents would but these parents were described as 'perfect' so I would hope there would be no horrible surprises for this child when he got older.
Secondly,as far as I can see in no way does this father 'want to care for him', he wants his sister to do it, who lives some distance from him, and presumably he is going to pop into and out of this child's life as he feels able to/wishes to or whatever. He does not live his partner and their child. I am not being critical of his choices here, simply stating that he does not want to provide what this child needs, day to day care in a loving home. How could that be outweighed by a rather on-off relationship with a man who denied any involvement in his birth!
This 'desperation' sounds like the adoptive parents are only thinking of themselves, I would very much doubt that 'perfect parents' would be doing that!
Presumably, the child could maintain a relationship with his birth father and the birth father's sister, his aunt, and I would imagine if this were offered the adoptive parents would be willing for this to happen. If I had to allow this to happen in order to keep the child I had raised for so long, I would. They may even feel it would be beneficial for the child.
I agree with Kew as usual.
And I agree with Devora (the child may turn round etc) and actually some contact with birth father may mean that the child grows up with a realistic view of the birth father, which would include the fact birth father was himself (IMHO)'desperate' to deny that he was the father.