Stop reading mama

Reading a book with Stuart goes something like this:
Me: reading, reading, reading
S: What's that, who's that, why, etc. etc.
Me: If you want me to keep reading you have to stop talking so you can hear the story [I know it's sounds rotten to tell your kid to stop talking, but it's too annoying to try to read over him talking and he's frustrated because I'm not answering his questions]

Here's what happened the other day:
Me: reading, reading
S: Stop reading mama. What's that, who's that, why, etc.....
Me: reading
S: Stop reading mama..... you get the picture