Oh Tim... I am sorry for the loss of this lovely mare. I can empathize with you whole-heartedly. It is so hard to lose these beloved creatures. She sounded like an exceptional horse and a wonderful friend. As hard as it is, just remember that she had a wonderful life with you.
I wish I could tell you that it gets easy soon, but it just doesn't. I still have a hard time looking at pictures of Sadar, though I just can't stop myself sometimes. I've been lucky enough to enjoy his spirit through his son, and I know he is always with me. Sadar has my heart... quite literally. I got a tattoo of him above my heart, so he will always be with me and to this day I still sleep with his forelock under my bed. It eases the loss just a bit to know that he's still here.
Is there any chance that the people that leased her might offer you the colt, just to keep a bit of the Kay Cee legacy? I understand that they paid for her breeding, but maybe if they really understood how close you and Kay Cee were, they mgith consider?