http://archiveofourown.org/works/7964605 - "I Wanna Know What You're Thinking," by Milionking.

I'm a little surprised it took fandom this long to write about Alex Galchenyuk's girlfriend hitting him, but this just seems super-gross. I have not actually read it yet, but the author is pretty clear in the notes about the fact that they're dramatizing that real-life event (in the service of a Gally Squared fic).

I would love to ask the title question of the author, tbh.