Writing prompts - spell it out

This is my first submission for the new Writing Prompts group on Vox.
 
This week's prompt: Write a scene in which the dramatic tension revolves around a misspelling: a road sign, the name on a birthday cake, the directions to a doctor's office, a word in a spelling bee...

I walk into our home office and find my son intently plinking away at the computer.

"What are you working on?"
"It's a paper for my sociology class. I'm almost done."
"Interesting topic?"
"Yeah. Kind of. I was supposed to take a position about whether people have to have religion to be moral. I think I did a good job."
"How about letting me read it?"
"I don't know. Maybe. I guess. But you can't proofread."
"Why not?"
"I just don't want you to."

Looking over his shoulder at the screen, I can already see a misspelled word.

"But what if I see a misspelling or a grammatical error? Wouldn't you want to know so you can fix it?"
"No."
"Why not?"
"I just don't. If I let you read it, you can't say anything."
"So, if I see an error, I'm just supposed to keep my mouth shut? You'd rather turn it in with a mistake than have me point it out? That's really the way you want it?"
"Yeah."
"Okay, but that seems counterproductive. Other people pay me to do this for them."
"I don't care. Damn."
"All right, all right. I'd really like to read it, so I promise I won't say anything. But it's going to be frustrating, you know."
"Whatever."