Next Page >>
The simple answer is that there is no reason for him to be sad (except perhaps being sad/contemplative about her sad story in general).She played no part in his life and he wasn’t on a mission to find her. Remember how canon Spike waved away opportunities to learn about her whatabouts?
Espera’s words echo this lack of attachment, when she mentions reuniting with “her“ family. She might have laid Spike’s egg over 1,000 years ago and sacrificed her life to save him (and his older sibling), but they haven’t got a chance to become a family or even know each other. I assume being long dead can change your perspective and how you view such things as well.
And good answer on Spike's reaction. When it comes down to it, Spike never knew his biological mother. He's been with Twilight since the moment he hatched. His first memories were of her and growing up with her. His sadness for Espera, I think, is more of a quiet sadness. It's a shame he never got to know her or make any memories, but Spike, at the very least, got to spend these moments with her, which helped reunite him with the one who means the most to him.
Espera helped guide her son back to Twilight. I'm sure that won't be forgotten.
(This bot is unofficial, it is NOT affiliated with Equestria Daily. If you do not wish to get these notifications anymore, please just block this account.)