My eldest recently reached out to her bio father, who she's never met/had any contact with.
To my surprise he responded (to me not her) He is willing to chat over FB messenger and answer any questions she has, but wants to wait until after Christmas (this is fair, I felt)
However he's now sent me a further asking which date would be appropriate to initiate contact, so far, so sensible but he wants to message me not dd and I can pass the messages onto her and then relay her response to him 
Dd is 12, her Facebook is logged into my phone, he knows this from the brief messages we've sent. I have told him he can send me what he intends on sending on her prior to sending it to her if he feels the need, but he is insistent that all contact should come through me and not direct to dd, for her own well being.
I've asked why, he replied that he just feels it would be a more appropriate way of going about dealing with this than him sending messages directly to a 12yo child who is essentially a stranger to him.
Does he have a point? Would IBU to refuse to agree to this and suggest he gets over himself and messages her directly as per her wishes?