How is こともなかった used? It's been almost a year and I'm back to learning Japanese again.
I decided to read some raw manga on comico. 
I'm reading となりの席の小林さん. 
On the 3rd page of chapter 0,
there was a line I'm slightly confused.


話したこともなかった子だけど···

I feel like it means

"A child that doesn't usually talk, but..."

I know what 話した means. It's the past form of 話す　which means speak, right? 

I also have an idea of how こと works but

But I don't really know what もなかった means or how does it work here in this sentence.

I really hope you can help me with this one.
Thank you!