Falon (sp?) told him ages ago she didn't want children and so I think he was totally over the top about this.
It was the end of a pregnancy that they didn't even know existed.
You say:
as time has passed the urge to become a father has grown
- I don't see that as I never believed he really meant that he was OK with not having children in the first place. We see him all the time trying to prove his "dad-worthy" credentials! 🙄
when the possibility arose he was thrilled, and was planning the future with excitement, ignoring Fallon’s feelings. He is now suffering a bereavement as much as any prospective mother might
... actually I think that the possibility never did really arise - he's just angry at the fact that he may have been able to have his way after all. I think he's been "pushing quietly" all along for a family - the elephant has always been in the room.
His bereavement is the loss of what "might have been" and as you say, he selfishly is putting that on Falon, who can barely endure him at the moment.
I'm not sure many prospective mothers would grieve a loss of a pregnancy they didn't know existed If they didn't want to be pregnant. However, I agree that anyone who was trying to have a baby would be grieving once they knew.
Maybe you mean like this?
He was wanting to have a baby all along.
I had a very early miscarriage once. It was a sadness in a way - but so early (and I wasn't trying to get pregnant) that my feelings were quite simple. I hadn't known (which was odd for me) so I didn't truly feel a loss.
Perhaps I'm just odd.