Thanks for the feedback and emails following on from the emotional sucker punch that was clocking the baby scan pic of a former... well, not sure how to describe him. You get the gist though.
One of my friends is a demon at pinpointing the reason for emotional turbulence and when found myself nodding heartily in agreement when she wrote: "I guess it puts the final nail in the coffin of that fantasy."
And she's so right! The fantasy really is well and truly over. The thoughts that gave my little ego a boost? Well and truly over. Boom. I know that I couldn't be in a better place with my relationship and I am so lucky. The grass is very green on this side of the fence and I need to remember that.