He cannot make demands like that, You should stick to an agreement of when he can see her and if he does not make it, then tough he has to wait until it is the agreed time to see her again. I agreed every other fortnight with my ex, if he does not make it, he will have to wait until it is his time.
I know what you mean aboout the smiles and stuff, I do all the hard work with C so I don't want the ex to get to make him smile and laugh ( so far C has only cried and moaned when in his father;s presence) but one day he will smile and laugh for him and I will probably be quite upset only because he is useless and rubbish and he does not deserve to have the nice side of our son.