Don't look.

She coughed, sat there for a few seconds; then, grabbed her napkin, took out the glob of gunk in her mouth, and looked at it. And you? Sandwich in your mouth, looked over her shoulder and saw it all. I held your hair and rubbed your back as you wretched because some things can't be unseen. You have to learn not to look, I said. I shook my head, Don't look.