Did we know all along that Charlie's mom was a mermaid? If so, this means that I missed something which makes me a bit disappointed.

Hopefully this isn't an old question, I did find the lime thread before asking about it.

I found this link
http://neilgaimanboard.com/eve/forums/a/tpc/f/83410873521/m/37010637431

That is just about Charlie's dad fooling him while walking on the beach "...did you see the mermaid? opps you just missed it..." This however isn't a "your mom is also a mythological being."

I always wondered how mermaids reproduce and give birth. I'd just sort of assumed they released eggs and milt into the water and the eggs fertilised and hatched themselves. That would explain why Charlie is such a great singer, though.

Male siren? That does explain the voice and actually makes me happy with my question at the same time.
We didn't know that mom was a mermaid, but it fits that she is a siren.

wait, what? I was up late reading, so maybe I missed something...but I didn't take it that she was Charlie's mom....did I miss something? I just thought the mermaid at the end showed that he was in touch with his magical side and could see the wonder around him and so could his son...

Charlie's mom is not a mermaid. You need to reread the book.Charlie's mom died in the book.She was not the mermaid.

Yes, I'm a little bit late to the party, but here's what I thought (and I'm going to re-read the book anyway):
Charlie's late Mom was a Siren, and it was maybe her spirit that came and hung out and sang with Charlie and his son.
Or, she was one of the many females that came into and out of Anansi's life before Charlie's mom came into the picture.
Anyway, it was a lovely, touching ending that made me smile.